asdf

lib/css-plugin.js

@@ -41,6 +41,7 @@ const assetRe = new RegExp('/fake/path/to/asset/([^/]+)/', 'g');
 const appendCssModule = '\0appendCss';
 const appendCssSource = `
   export default function appendCss(css) {
+    if (__PRERENDER__) return;
     const style = document.createElement('style');
     style.textContent = css;
     document.head.append(style);

lib/initial-css-plugin.js

@@ -30,7 +30,7 @@ export default function initialCssPlugin() {
     async load(id) {
       if (id !== initialCssModule) return;
 
-      const matches = await globP('shared/initial-app/**/*.css', {
+      const matches = await globP('shared/prerendered-app/**/*.css', {
         nodir: true,
         cwd: path.join(process.cwd(), 'src'),
       });

src/client/initial-app/App/index.tsx

@@ -1,16 +1,16 @@
 import type { FileDropEvent } from 'file-drop-element';
-import type SnackBarElement from 'shared/initial-app/custom-els/snack-bar';
+import type SnackBarElement from 'shared/custom-els/snack-bar';
-import type { SnackOptions } from 'shared/initial-app/custom-els/snack-bar';
+import type { SnackOptions } from 'shared/custom-els/snack-bar';
 
 import { h, Component } from 'preact';
 
-import { linkRef } from 'shared/initial-app/util';
+import { linkRef } from 'shared/prerendered-app/util';
 import * as style from './style.css';
 import 'add-css:./style.css';
 import 'file-drop-element';
-import 'shared/initial-app/custom-els/snack-bar';
+import 'shared/custom-els/snack-bar';
-import Intro from 'shared/initial-app/Intro';
+import Intro from 'shared/prerendered-app/Intro';
-import 'shared/initial-app/custom-els/loading-spinner';
+import 'shared/custom-els/loading-spinner';
 
 const ROUTE_EDITOR = '/editor';
 

src/client/initial-app/custom-els/missing-types.d.ts

@@ -1,5 +1,5 @@
-/// <reference path="../../../shared/initial-app/custom-els/snack-bar/missing-types.d.ts" />
+/// <reference path="../../../shared/custom-els/snack-bar/missing-types.d.ts" />
-/// <reference path="../../../shared/initial-app/custom-els/loading-spinner/missing-types.d.ts" />
+/// <reference path="../../../shared/custom-els/loading-spinner/missing-types.d.ts" />
 import type { FileDropElement, FileDropEvent } from 'file-drop-element';
 
 interface FileDropAttributes extends preact.JSX.HTMLAttributes {

src/client/lazy-app/Compress/Options/Range/index.tsx

@@ -3,7 +3,7 @@ import * as style from './style.css';
 import 'add-css:./style.css';
 import RangeInputElement from './custom-els/RangeInput';
 import './custom-els/RangeInput';
-import { linkRef } from 'shared/initial-app/util';
+import { linkRef } from 'shared/prerendered-app/util';
 
 interface Props extends preact.JSX.HTMLAttributes {}
 interface State {}

src/client/lazy-app/Compress/Output/custom-els/TwoUp/index.ts

@@ -73,9 +73,14 @@ export default class TwoUp extends HTMLElement {
   connectedCallback() {
     this._childrenChange();
 
-    this._handle.innerHTML = `<div class="${
+    // prettier-ignore
-      styles.scrubber
+    this._handle.innerHTML =
-    }">${`<svg viewBox="0 0 27 20" fill="currentColor">${'<path d="M17 19.2l9.5-9.6L16.9 0zM9.6 0L0 9.6l9.6 9.6z"/>'}</svg>`}</div>`;
+      `<div class="${styles.scrubber}">${
+        `<svg viewBox="0 0 27 20">${
+          `<path class="${styles.arrowLeft}" d="M9.6 0L0 9.6l9.6 9.6z"/>` +
+          `<path class="${styles.arrowRight}" d="M17 19.2l9.5-9.6L16.9 0z"/>`
+        }</svg>
+      `}</div>`;
 
     if (!this._everConnected) {
       this._resetPosition();

src/client/lazy-app/Compress/Output/custom-els/TwoUp/styles.css

@@ -2,12 +2,11 @@ two-up {
   display: grid;
   position: relative;
   --split-point: 0;
-  --accent-color: #777;
+  --track-color: rgb(0 0 0 / 0.6);
-  --track-color: var(--accent-color);
+  --thumb-background: var(--black);
-  --thumb-background: #fff;
   --thumb-color: var(--accent-color);
   --thumb-size: 62px;
-  --bar-size: 6px;
+  --bar-size: 9px;
   --bar-touch-size: 30px;
 }
 
@@ -37,8 +36,6 @@ two-up[legacy-clip-compat] > :not(.two-up-handle) {
   height: 100%;
   width: var(--bar-size);
   margin: 0 auto;
-  box-shadow: inset calc(var(--bar-size) / 2) 0 0 rgba(0, 0, 0, 0.1),
-    0 1px 4px rgba(0, 0, 0, 0.4);
   background: var(--track-color);
 }
 
@@ -47,14 +44,11 @@ two-up[legacy-clip-compat] > :not(.two-up-handle) {
   position: absolute;
   top: 50%;
   left: 50%;
-  transform-origin: 50% 50%;
   transform: translate(-50%, -50%);
   width: var(--thumb-size);
   height: calc(var(--thumb-size) * 0.9);
   background: var(--thumb-background);
-  border: 1px solid rgba(0, 0, 0, 0.2);
   border-radius: var(--thumb-size);
-  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
   color: var(--thumb-color);
   box-sizing: border-box;
   padding: 0 calc(var(--thumb-size) * 0.24);
@@ -64,6 +58,14 @@ two-up[legacy-clip-compat] > :not(.two-up-handle) {
   flex: 1;
 }
 
+.arrow-left {
+  fill: var(--pink);
+}
+
+.arrow-right {
+  fill: var(--blue);
+}
+
 two-up[orientation='vertical'] .two-up-handle {
   width: auto;
   height: var(--bar-touch-size);

src/client/lazy-app/Compress/Output/index.tsx

@@ -10,15 +10,15 @@ import {
   ToggleBackgroundIcon,
   AddIcon,
   RemoveIcon,
-  BackIcon,
   ToggleBackgroundActiveIcon,
   RotateIcon,
+  MoreIcon,
 } from '../../icons';
 import { twoUpHandle } from './custom-els/TwoUp/styles.css';
 import type { PreprocessorState } from '../../feature-meta';
 import { cleanSet } from '../../util/clean-modify';
 import type { SourceImage } from '../../Compress';
-import { linkRef } from 'shared/initial-app/util';
+import { linkRef } from 'shared/prerendered-app/util';
 
 interface Props {
   source?: SourceImage;
@@ -28,7 +28,6 @@ interface Props {
   rightCompressed?: ImageData;
   leftImgContain: boolean;
   rightImgContain: boolean;
-  onBack: () => void;
   onPreprocessorChange: (newState: PreprocessorState) => void;
 }
 
@@ -36,6 +35,7 @@ interface State {
   scale: number;
   editingScale: boolean;
   altBackground: boolean;
+  menuOpen: boolean;
 }
 
 const scaleToOpts: ScaleToOpts = {
@@ -50,6 +50,7 @@ export default class Output extends Component<Props, State> {
     scale: 1,
     editingScale: false,
     altBackground: false,
+    menuOpen: false,
   };
   canvasLeft?: HTMLCanvasElement;
   canvasRight?: HTMLCanvasElement;
@@ -162,6 +163,10 @@ export default class Output extends Component<Props, State> {
     this.pinchZoomLeft.scaleTo(this.state.scale / 1.25, scaleToOpts);
   };
 
+  private toggleMenu = () => {
+    this.setState(({ menuOpen }) => ({ menuOpen: !menuOpen }));
+  };
+
   private onRotateClick = () => {
     const { preprocessorState: inputProcessorState } = this.props;
     if (!inputProcessorState) return;
@@ -255,8 +260,8 @@ export default class Output extends Component<Props, State> {
   };
 
   render(
-    { mobileView, leftImgContain, rightImgContain, source, onBack }: Props,
+    { mobileView, leftImgContain, rightImgContain, source }: Props,
-    { scale, editingScale, altBackground }: State,
+    { scale, editingScale, altBackground, menuOpen }: State,
   ) {
     const leftDraw = this.leftDrawable();
     const rightDraw = this.rightDrawable();
@@ -314,12 +319,6 @@ export default class Output extends Component<Props, State> {
           </pinch-zoom>
         </two-up>
 
-        <div class={style.back}>
-          <button class={style.button} onClick={onBack}>
-            <BackIcon />
-          </button>
-        </div>
-
         <div class={style.controls}>
           <div class={style.zoomControls}>
             <button class={style.button} onClick={this.zoomOut}>
@@ -349,26 +348,34 @@ export default class Output extends Component<Props, State> {
             <button class={style.button} onClick={this.zoomIn}>
               <AddIcon />
             </button>
-          </div>
-          <div class={style.buttonsNoWrap}>
             <button
-              class={style.button}
+              class={`${style.button} ${style.moreButton} ${
-              onClick={this.onRotateClick}
+                menuOpen ? style.open : ''
-              title="Rotate image"
+              }`}
+              onClick={this.toggleMenu}
             >
-              <RotateIcon />
+              <MoreIcon />
-            </button>
-            <button
-              class={`${style.button} ${altBackground ? style.active : ''}`}
-              onClick={this.toggleBackground}
-              title="Change canvas color"
-            >
-              {altBackground ? (
-                <ToggleBackgroundActiveIcon />
-              ) : (
-                <ToggleBackgroundIcon />
-              )}
             </button>
+            <aside class={`${style.menu} ${menuOpen ? style.open : ''}`}>
+              <button
+                class={style.button}
+                onClick={this.onRotateClick}
+                title="Rotate image"
+              >
+                <RotateIcon />
+              </button>
+              <button
+                class={`${style.button} ${altBackground ? style.active : ''}`}
+                onClick={this.toggleBackground}
+                title="Change canvas color"
+              >
+                {altBackground ? (
+                  <ToggleBackgroundActiveIcon />
+                ) : (
+                  <ToggleBackgroundIcon />
+                )}
+              </button>
+            </aside>
           </div>
         </div>
       </div>

src/client/lazy-app/Compress/Output/style.css

@@ -1,5 +1,5 @@
 .output {
-  composes: abs-fill from '../../../../shared/initial-app/util.css';
+  composes: abs-fill from global;
 
   &::before {
     content: '';
@@ -19,12 +19,12 @@
 }
 
 .two-up {
-  composes: abs-fill from '../../../../shared/initial-app/util.css';
+  composes: abs-fill from global;
   --accent-color: var(--button-fg);
 }
 
 .pinch-zoom {
-  composes: abs-fill from '../../../../shared/initial-app/util.css';
+  composes: abs-fill from global;
   outline: none;
   display: flex;
   justify-content: center;
@@ -54,6 +54,7 @@
 
   /* Allow clicks to fall through to the pinch zoom area */
   pointer-events: none;
+
   & > * {
     pointer-events: auto;
   }
@@ -76,6 +77,7 @@
     border-bottom-left-radius: 0;
     margin-left: 0;
   }
+
   & :not(:last-child) {
     margin-right: 0;
     border-right-width: 0;
@@ -90,46 +92,97 @@
   align-items: center;
   box-sizing: border-box;
   margin: 4px;
-  background-color: #fff;
+  background-color: rgba(29, 29, 29, 0.92);
-  border: 1px solid rgba(0, 0, 0, 0.2);
+  border: 1px solid rgba(0, 0, 0, 0.67);
-  border-radius: 5px;
+  border-radius: 6px;
   line-height: 1;
   white-space: nowrap;
-  height: 36px;
+  height: 39px;
   padding: 0 8px;
   cursor: pointer;
 
+  /*
   @media (min-width: 600px) {
-    height: 48px;
+    height: 39px;
     padding: 0 16px;
   }
+  */
 
   &:focus {
-    box-shadow: 0 0 0 2px var(--button-fg);
+    box-shadow: 0 0 0 2px #fff;
     outline: none;
     z-index: 1;
   }
 }
 
 .button {
-  color: var(--button-fg);
+  color: #fff;
 
   &:hover {
-    background-color: #eee;
+    /* background-color: #eee; */
+    background: rgba(40, 40, 40, 0.92);
   }
 
   &.active {
-    background: #34b9eb;
+    background: rgba(72, 72, 72, 0.92);
     color: #fff;
 
+    /*
     &:hover {
-      background: #32a3ce;
+      background: rgba(72, 72, 72, 0.92);
     }
+    */
+  }
+}
+
+.moreButton {
+  padding: 0 4px;
+
+  &.open {
+    background: rgba(72, 72, 72, 0.92);
+  }
+}
+
+.menu {
+  display: inline-block;
+  position: absolute;
+  right: 0;
+  bottom: 100%;
+  z-index: 100;
+  display: flex;
+  flex-wrap: nowrap;
+  flex-direction: row;
+  align-items: flex-start;
+  display: none;
+
+  &.open {
+    display: block;
+    animation: menuOpen 500ms ease forwards 1;
+  }
+
+  button {
+    margin-top: 8px;
+    margin-bottom: 8px;
+    border-radius: 1.2rem;
+  }
+
+  h5 {
+    text-transform: uppercase;
+    font-size: 0.8rem;
+    color: #fff;
+    margin: 8px 4px;
+    padding: 10px 0 0;
+  }
+}
+
+@keyframes menuOpen {
+  0% {
+    transform: translateY(10px) scale(0.8);
   }
 }
 
 .zoom {
-  color: #625e80;
+  color: #939393;
   cursor: text;
   width: 6em;
   font: inherit;
@@ -137,7 +190,7 @@
   justify-content: center;
 
   &:focus {
-    box-shadow: inset 0 1px 4px rgba(0, 0, 0, 0.2), 0 0 0 2px var(--button-fg);
+    box-shadow: inset 0 1px 4px rgba(0, 0, 0, 0.2), 0 0 0 2px #fff;
   }
 }
 
@@ -145,17 +198,10 @@
   position: relative;
   top: 1px;
   margin: 0 3px 0 0;
-  color: #888;
+  color: #fff;
   border-bottom: 1px dashed #999;
 }
 
-.back {
-  position: absolute;
-  top: 0;
-  left: 0;
-  padding: 9px;
-}
-
 .buttons-no-wrap {
   display: flex;
   pointer-events: none;

src/client/lazy-app/Compress/Results/index.tsx

@@ -8,7 +8,7 @@ import {
   CopyAcrossIcon,
   CopyAcrossIconProps,
 } from 'client/lazy-app/icons';
-import 'shared/initial-app/custom-els/loading-spinner';
+import 'shared/custom-els/loading-spinner';
 import { SourceImage } from '../';
 
 interface Props {

src/client/lazy-app/Compress/Results/style.css

@@ -124,7 +124,7 @@
 .copy-to-other {
   grid-row: 1;
   grid-column: copy-button;
-  composes: unbutton from '../../../../shared/initial-app/util.css';
+  composes: unbutton from global;
   composes: download;
 
   background: #656565;

src/client/lazy-app/Compress/index.tsx

@@ -30,7 +30,7 @@ import './custom-els/MultiPanel';
 import Results from './Results';
 import WorkerBridge from '../worker-bridge';
 import { resize } from 'features/processors/resize/client';
-import type SnackBarElement from 'shared/initial-app/custom-els/snack-bar';
+import type SnackBarElement from 'shared/custom-els/snack-bar';
 import { CopyAcrossIconProps, ExpandIcon } from '../icons';
 
 export type OutputType = EncoderType | 'identity';
@@ -862,10 +862,22 @@ export default class Compress extends Component<Props, State> {
           rightCompressed={rightImageData}
           leftImgContain={leftImgContain}
           rightImgContain={rightImgContain}
-          onBack={onBack}
           preprocessorState={preprocessorState}
           onPreprocessorChange={this.onPreprocessorChange}
         />
+        <button class={style.back} onClick={onBack}>
+          <svg viewBox="0 0 61 53.3">
+            <title>Back</title>
+            <path
+              class={style.backBlob}
+              d="M0 25.6c-.5-7.1 4.1-14.5 10-19.1S23.4.1 32.2 0c8.8 0 19 1.6 24.4 8s5.6 17.8 1.7 27a29.7 29.7 0 01-20.5 18c-8.4 1.5-17.3-2.6-24.5-8S.5 32.6.1 25.6z"
+            />
+            <path
+              class={style.backX}
+              d="M41.6 17.1l-2-2.1-8.3 8.2-8.2-8.2-2 2 8.2 8.3-8.3 8.2 2.1 2 8.2-8.1 8.3 8.2 2-2-8.2-8.3z"
+            />
+          </svg>
+        </button>
         {mobileView ? (
           <div class={style.options}>
             <multi-panel class={style.multiPanel} open-one-only>

src/client/lazy-app/Compress/style.css

@@ -73,3 +73,24 @@
 :focus .expand-icon {
   fill: #34b9eb;
 }
+
+.back {
+  composes: unbutton from global;
+  position: absolute;
+  top: var(--dist);
+  left: var(--dist);
+  --dist: 14px;
+
+  & > svg {
+    width: 58px;
+  }
+}
+
+.back-blob {
+  fill: var(--hot-pink);
+  opacity: 0.77;
+}
+
+.back-x {
+  fill: var(--white);
+}

src/client/lazy-app/icons/index.tsx

@@ -37,6 +37,14 @@ export const RotateIcon = (props: preact.JSX.HTMLAttributes) => (
   </Icon>
 );
 
+export const MoreIcon = (props: preact.JSX.HTMLAttributes) => (
+  <Icon {...props}>
+    <circle cx="12" cy="6" r="2" fill="#fff" />
+    <circle cx="12" cy="12" r="2" fill="#fff" />
+    <circle cx="12" cy="18" r="2" fill="#fff" />
+  </Icon>
+);
+
 export const AddIcon = (props: preact.JSX.HTMLAttributes) => (
   <Icon {...props}>
     <path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z" />
@@ -67,12 +75,6 @@ export const ExpandIcon = (props: preact.JSX.HTMLAttributes) => (
   </Icon>
 );
 
-export const BackIcon = (props: preact.JSX.HTMLAttributes) => (
-  <Icon {...props}>
-    <path d="M20 11H7.8l5.6-5.6L12 4l-8 8 8 8 1.4-1.4L7.8 13H20v-2z" />
-  </Icon>
-);
-
 const copyAcrossRotations = {
   up: 90,
   right: 180,

src/client/lazy-app/sw-bridge/index.ts

@@ -1,4 +1,4 @@
-import type SnackBarElement from 'shared/initial-app/custom-els/snack-bar';
+import type SnackBarElement from 'shared/custom-els/snack-bar';
 
 import { get, set } from 'idb-keyval';
 

src/client/missing-types.d.ts

@@ -11,7 +11,7 @@
  * limitations under the License.
  */
 /// <reference path="../../missing-types.d.ts" />
-/// <reference path="../shared/initial-app/Intro/missing-types.d.ts" />
+/// <reference path="../shared/prerendered-app/Intro/missing-types.d.ts" />
 
 interface Navigator {
   readonly standalone: boolean;

src/features/processors/resize/client/index.tsx

@@ -22,7 +22,7 @@ import {
   inputFieldChecked,
 } from 'client/lazy-app/util';
 import * as style from 'client/lazy-app/Compress/Options/style.css';
-import { linkRef } from 'shared/initial-app/util';
+import { linkRef } from 'shared/prerendered-app/util';
 import Select from 'client/lazy-app/Compress/Options/Select';
 import Expander from 'client/lazy-app/Compress/Options/Expander';
 import Checkbox from 'client/lazy-app/Compress/Options/Checkbox';

src/shared/custom-els/loading-spinner/index.ts

@@ -1,4 +1,5 @@
 import * as styles from './styles.css';
+import 'add-css:./styles.css';
 
 // So it doesn't cause an error when running in node
 const HTMLEl = ((__PRERENDER__

src/shared/custom-els/snack-bar/index.ts

@@ -1,4 +1,5 @@
 import * as style from './styles.css';
+import 'add-css:./styles.css';
 
 // So it doesn't cause an error when running in node
 const HTMLEl = ((__PRERENDER__

src/shared/initial-app/Intro/index.tsx

@@ -1,255 +0,0 @@
-import { h, Component } from 'preact';
-
-import { linkRef } from 'shared/initial-app/util';
-import '../custom-els/loading-spinner';
-
-import logo from 'url:./imgs/logo.svg';
-import largePhoto from 'url:./imgs/demos/demo-large-photo.jpg';
-import artwork from 'url:./imgs/demos/demo-artwork.jpg';
-import deviceScreen from 'url:./imgs/demos/demo-device-screen.png';
-import largePhotoIcon from 'url:./imgs/demos/icon-demo-large-photo.jpg';
-import artworkIcon from 'url:./imgs/demos/icon-demo-artwork.jpg';
-import deviceScreenIcon from 'url:./imgs/demos/icon-demo-device-screen.jpg';
-import logoIcon from 'url:./imgs/demos/icon-demo-logo.png';
-import * as style from './style.css';
-import type SnackBarElement from 'shared/initial-app/custom-els/snack-bar';
-import 'shared/initial-app/custom-els/snack-bar';
-
-const demos = [
-  {
-    description: 'Large photo (2.8mb)',
-    filename: 'photo.jpg',
-    url: largePhoto,
-    iconUrl: largePhotoIcon,
-  },
-  {
-    description: 'Artwork (2.9mb)',
-    filename: 'art.jpg',
-    url: artwork,
-    iconUrl: artworkIcon,
-  },
-  {
-    description: 'Device screen (1.6mb)',
-    filename: 'pixel3.png',
-    url: deviceScreen,
-    iconUrl: deviceScreenIcon,
-  },
-  {
-    description: 'SVG icon (13k)',
-    filename: 'squoosh.svg',
-    url: logo,
-    iconUrl: logoIcon,
-  },
-];
-
-const installButtonSource = 'introInstallButton-Purple';
-
-interface Props {
-  onFile?: (file: File) => void;
-  showSnack?: SnackBarElement['showSnackbar'];
-}
-interface State {
-  fetchingDemoIndex?: number;
-  beforeInstallEvent?: BeforeInstallPromptEvent;
-}
-
-export default class Intro extends Component<Props, State> {
-  state: State = {};
-  private fileInput?: HTMLInputElement;
-  private installingViaButton = false;
-
-  constructor() {
-    super();
-
-    if (__PRERENDER__) return;
-    // Listen for beforeinstallprompt events, indicating Squoosh is installable.
-    window.addEventListener(
-      'beforeinstallprompt',
-      this.onBeforeInstallPromptEvent,
-    );
-
-    // Listen for the appinstalled event, indicating Squoosh has been installed.
-    window.addEventListener('appinstalled', this.onAppInstalled);
-  }
-
-  private resetFileInput = () => {
-    this.fileInput!.value = '';
-  };
-
-  private onFileChange = (event: Event): void => {
-    const fileInput = event.target as HTMLInputElement;
-    const file = fileInput.files && fileInput.files[0];
-    if (!file) return;
-    this.resetFileInput();
-    this.props.onFile!(file);
-  };
-
-  private onButtonClick = () => {
-    this.fileInput!.click();
-  };
-
-  private onDemoClick = async (index: number, event: Event) => {
-    try {
-      this.setState({ fetchingDemoIndex: index });
-      const demo = demos[index];
-      const blob = await fetch(demo.url).then((r) => r.blob());
-
-      // Firefox doesn't like content types like 'image/png; charset=UTF-8', which Webpack's dev
-      // server returns. https://bugzilla.mozilla.org/show_bug.cgi?id=1497925.
-      const type = /[^;]*/.exec(blob.type)![0];
-      const file = new File([blob], demo.filename, { type });
-      this.props.onFile!(file);
-    } catch (err) {
-      this.setState({ fetchingDemoIndex: undefined });
-      this.props.showSnack!("Couldn't fetch demo image");
-    }
-  };
-
-  private onBeforeInstallPromptEvent = (event: BeforeInstallPromptEvent) => {
-    // Don't show the mini-infobar on mobile
-    event.preventDefault();
-
-    // Save the beforeinstallprompt event so it can be called later.
-    this.setState({ beforeInstallEvent: event });
-
-    // Log the event.
-    const gaEventInfo = {
-      eventCategory: 'pwa-install',
-      eventAction: 'promo-shown',
-      nonInteraction: true,
-    };
-    ga('send', 'event', gaEventInfo);
-  };
-
-  private onInstallClick = async (event: Event) => {
-    // Get the deferred beforeinstallprompt event
-    const beforeInstallEvent = this.state.beforeInstallEvent;
-    // If there's no deferred prompt, bail.
-    if (!beforeInstallEvent) return;
-
-    this.installingViaButton = true;
-
-    // Show the browser install prompt
-    beforeInstallEvent.prompt();
-
-    // Wait for the user to accept or dismiss the install prompt
-    const { outcome } = await beforeInstallEvent.userChoice;
-    // Send the analytics data
-    const gaEventInfo = {
-      eventCategory: 'pwa-install',
-      eventAction: 'promo-clicked',
-      eventLabel: installButtonSource,
-      eventValue: outcome === 'accepted' ? 1 : 0,
-    };
-    ga('send', 'event', gaEventInfo);
-
-    // If the prompt was dismissed, we aren't going to install via the button.
-    if (outcome === 'dismissed') {
-      this.installingViaButton = false;
-    }
-  };
-
-  private onAppInstalled = () => {
-    // We don't need the install button, if it's shown
-    this.setState({ beforeInstallEvent: undefined });
-
-    // Don't log analytics if page is not visible
-    if (document.hidden) {
-      return;
-    }
-
-    // Try to get the install, if it's not set, use 'browser'
-    const source = this.installingViaButton ? installButtonSource : 'browser';
-    ga('send', 'event', 'pwa-install', 'installed', source);
-
-    // Clear the install method property
-    this.installingViaButton = false;
-  };
-
-  render({}: Props, { fetchingDemoIndex, beforeInstallEvent }: State) {
-    return (
-      <div class={style.intro}>
-        <div>
-          <div class={style.logoSizer}>
-            <div class={style.logoContainer}>
-              <img
-                src={logo}
-                class={style.logo}
-                alt="Squoosh"
-                decoding="async"
-              />
-            </div>
-          </div>
-          <p class={style.openImageGuide}>
-            Drag &amp; drop or{' '}
-            <button class={style.selectButton} onClick={this.onButtonClick}>
-              select an image
-            </button>
-            <input
-              class={style.hide}
-              ref={linkRef(this, 'fileInput')}
-              type="file"
-              onChange={this.onFileChange}
-            />
-          </p>
-          <p>Or try one of these:</p>
-          <ul class={style.demos}>
-            {demos.map((demo, i) => (
-              <li key={demo.url} class={style.demoItem}>
-                <button
-                  class={style.demoButton}
-                  onClick={this.onDemoClick.bind(this, i)}
-                >
-                  <div class={style.demo}>
-                    <div class={style.demoImgContainer}>
-                      <div class={style.demoImgAspect}>
-                        <img
-                          class={style.demoIcon}
-                          src={demo.iconUrl}
-                          alt=""
-                          decoding="async"
-                        />
-                        {fetchingDemoIndex === i && (
-                          <div class={style.demoLoading}>
-                            <loading-spinner class={style.demoLoadingSpinner} />
-                          </div>
-                        )}
-                      </div>
-                    </div>
-                    <div class={style.demoDescription}>{demo.description}</div>
-                  </div>
-                </button>
-              </li>
-            ))}
-          </ul>
-        </div>
-        {beforeInstallEvent && (
-          <button
-            type="button"
-            class={style.installButton}
-            onClick={this.onInstallClick}
-          >
-            Install
-          </button>
-        )}
-        <ul class={style.relatedLinks}>
-          <li>
-            <a href="https://github.com/GoogleChromeLabs/squoosh/">
-              View the code
-            </a>
-          </li>
-          <li>
-            <a href="https://github.com/GoogleChromeLabs/squoosh/issues">
-              Report a bug
-            </a>
-          </li>
-          <li>
-            <a href="https://github.com/GoogleChromeLabs/squoosh/blob/dev/README.md#privacy">
-              Privacy
-            </a>
-          </li>
-        </ul>
-      </div>
-    );
-  }
-}

src/shared/initial-app/Intro/style.css

@@ -1,228 +0,0 @@
-@font-face {
-  font-family: 'intro-text';
-  font-style: normal;
-  font-weight: 300;
-  font-display: block;
-  /* This only contains the chars for "Drag & drop or" */
-  src: url('data:font/woff2;base64,d09GMgABAAAAAAXcAA4AAAAACowAAAWJAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGhYbg2gcMAZgAGwRCAqIQIcnCxYAATYCJAMoBCAFgwAHIBvqCFEU84FMI2Xh/P3g+Tfn532yQ/IgYz4BrJyhtkkZwFBYAZ49sI63e5v/NnqzIfbADyE0qxOqK8ESLoNNdULHihxbW0W86/qHEk4wT/eHShPRZJYYqUGkQdLSWCeSemZBzwpKyX/LRoAhMEQhqCFBw5RHNCc4hbVn35FsxtTXVHYyo7miu5VN2AW1fwzVauRgXnIGo2IWsYdViUoLu6mms5VFAn+SeQ4eBazfj7QodrMt4oyQHaGADEPRpTbDqJaoTENNK6DpOralUszf6gI/QsAhWZSMKVOirikSJxZRLBVD0S4mB0kTBRwopjZ/mt/2/25+bcSipgiHRmwiFI1g+XhwlshyEAsbJzGiGH+U5whHNgiXooplafI1rMFbmIqjGAPhmcSkVFxeu9hw87aXsGyL+dPE05qUpK2WyaVQcZVW+aDmw3aalLJKNmQORcpZYtBIuTrncN4xXoVZY617TBSsx2T1DHgGU6u4etE04wha1GEwjVkEaDttOrl1FCOwUMxgHnuooJo62ukcWEuc1/aT+dZ8b142t5tbzc3mGnP1EJqVTEGMYTjG14YxtGEEG+0E2axhe6Oa1E8UrDHDFjhTRywYNWrU9JHTlw7RmaslkrrGcTJ+znW4EzzP0zovE4Z5d0hqVhBobftBIKkwL09SOv3hhCuv1Dp9taTeCJ2Mj3KDT8iDng5DkWzPw/UdP8idNDkMnUyOwEauwnYLQeLC7GskNe72QKe97AmuA42E5FjfyYTM+HTdQ+Xqb+q4JvptyKZN1w47qMMwL58fyKZM1U6NXgWlOFdxx7DpXHDTz4UB89WMK3HH3uY7mavFopGF+u36lGlqZsL4ugmbqvZxveycMO+a4uyN3o7GT2qdHpfr6W++kNTn1crdx7Z+FW7PfffTmfnXV/2ivsh5UX93zdlzct6QlSuHSumG3oGNNT9/m9yXnDcnKfsmDx8xUaoKi+uvGs99H2ieUJUg8bTnVwQcDd/SPKwYWDUv+QkpT6MulMrcPTXNWYnIowxvoiwnX+opTMkvzOMGgpNpqnK32CNVwCnassw0BwQwTa0rLS3m1DfIoxx5PIE8SvEmSk3pHSWZiRVKjOOQSylJSHGXkhT/u/tg/Vm9UZQcS59TGb1qjcuuT0925iaaU1vaWpZJM4ukqWWlrdWSIcVNlOImvnrzLn53UpnSLzbGT5lUlpTiKiPJFEmyqywFLtOhcaYJkWkaGe/oGBlnmiIiIiKYpqHxLmdaWg5JpxxHSXpajsuVlkPSvb1JelqOC0pubbAn2A2UsDdYmTmjvbVlgTRhVBSSxpbF1nZD+jvkUR4rcJeSFBp2d19SUsVW5DjkUkoSoITHJ7iJEpZnZaL4OiF7g92DN1mz8b1RiM9RDk9ps9pcanamlnj2ftqbJpHJ0wpkRn2+RJ6qsGflpYrPnxG6A4r9zqGY3qCcqDuhsWGQhoXpQ0663cWFM4qNR0Jxj1R0UBT36pahMneH4NYV27jElOeyAAAACACAABy4uvGyOsj21Y9h3gIA3PuxYAYAuC/7vftf7L+PXunMAQDwBQIAAAIA5vR/HwCvOQ//TzLL7cPIHUC0zMI5v7+tHiVfzWOeSrJKZbFabWGNSnJE+jmsnmTjTZm6kBi9r0aLgm8qNk6t67ATuPlEitG+g+E7in1GMYxCxmIF9YzNJK7lRoSPc6PCD+8fxhp+YjdttDNAJw3UUU83M1jFClaylkpkU08NVZqkh0oaaBLPnaCTNhqpoaok2UkPZqy/JyfpKnVLkhrq6KGZCjpZxTJWqN9uJofD5HGMzSXHLaVbOmuTSnOp6cTQgJlaB6oF7RIITul8N+1sYjnL6aJqqoZ2inaxDIY2s2zwlXUs5zj7OPJmAPao+ZhVHy0A')
-    format('woff2');
-}
-
-@font-face {
-  font-family: 'intro-text';
-  font-style: normal;
-  font-weight: 500;
-  font-display: block;
-  /* Only contains the chars for "select an image" */
-  src: url('data:font/woff2;base64,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')
-    format('woff2');
-}
-
-@keyframes fade-in {
-  from {
-    opacity: 0;
-  }
-}
-
-.intro {
-  display: grid;
-  grid-template-rows: 1fr min-content;
-  align-items: center;
-  background: rgba(255, 255, 255, 0.25);
-  text-align: center;
-  font-size: 2rem;
-  -webkit-overflow-scrolling: touch;
-  overflow: auto;
-  padding: 20px 0 0;
-  height: 100%;
-  box-sizing: border-box;
-  overscroll-behavior: contain;
-  position: relative;
-}
-
-.logo-container {
-  position: relative;
-  padding-top: 100%;
-}
-
-.logo-sizer {
-  width: 90%;
-  max-width: 52vh;
-  margin: 0 auto;
-}
-
-.logo {
-  composes: abs-fill from '../util.css';
-  pointer-events: none;
-}
-
-.open-image-guide {
-  font: 300 11vw intro-text, sans-serif;
-  margin-bottom: 0;
-
-  @media (min-width: 460px) {
-    font-size: 50.6px;
-    padding: 0 40px;
-  }
-}
-
-.select-button {
-  composes: unbutton from '../util.css';
-  font-weight: 500;
-  color: #5d509e;
-
-  &:hover,
-  &:focus {
-    text-decoration: underline;
-  }
-}
-
-.hide {
-  display: none;
-}
-
-.demos {
-  display: block;
-  padding: 0;
-  border-top: 1px solid #e8e8e8;
-  margin: 0 auto;
-
-  @media (min-width: 400px) {
-    display: grid;
-    grid-template-columns: 1fr 1fr;
-  }
-
-  @media (min-width: 580px) {
-    border-top: none;
-    width: 523px;
-  }
-
-  @media (min-width: 900px) {
-    display: grid;
-    grid-template-columns: 1fr 1fr 1fr 1fr;
-    width: 773px;
-  }
-}
-
-.demo-item {
-  background: #fff;
-  display: flex;
-  border-bottom: 1px solid #e8e8e8;
-
-  @media (min-width: 580px) {
-    border: 1px solid #e8e8e8;
-    border-radius: 4px;
-    margin: 3px;
-  }
-}
-
-.demo-button {
-  composes: unbutton from '../util.css';
-  flex: 1;
-
-  &:hover,
-  &:focus {
-    background: #f5f5f5;
-  }
-}
-
-.demo {
-  display: flex;
-  align-items: center;
-  padding: 7px;
-  font-size: 1.3rem;
-}
-
-.demo-img-container {
-  overflow: hidden;
-  display: block;
-  width: 47px;
-  background: #ccc;
-  border-radius: 3px;
-  flex: 0 0 auto;
-}
-
-.demo-img-aspect {
-  position: relative;
-  padding-top: 100%;
-}
-
-.demo-icon {
-  composes: abs-fill from '../util.css';
-  pointer-events: none;
-}
-
-.demo-description {
-  display: flex;
-  align-items: center;
-  justify-content: flex-start;
-  text-align: left;
-  flex: 1;
-  padding: 0 10px;
-}
-
-.demo-loading {
-  composes: abs-fill from '../util.css';
-  background: rgba(0, 0, 0, 0.6);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  animation: fade-in 300ms ease-in-out;
-}
-
-.demo-loading-spinner {
-  --color: #fff;
-}
-
-.install-button {
-  composes: unbutton from '../util.css';
-
-  &:hover,
-  &:focus {
-    background: #504488;
-  }
-
-  background: #5d509e;
-  border: 1px solid #e8e8e8;
-  color: #fff;
-  padding: 14px;
-  font-size: 1.3rem;
-
-  position: absolute;
-  top: 1rem;
-  right: 1rem;
-
-  animation: fade-in 0.3s ease-in-out;
-}
-
-@keyframes fade-in {
-  from {
-    opacity: 0;
-  }
-}
-
-.related-links {
-  display: flex;
-  padding: 0;
-  justify-content: center;
-  font-size: 1.3rem;
-
-  & li {
-    display: block;
-    border-left: 1px solid #000;
-    padding: 0 0.6em;
-
-    &:first-child {
-      border-left: none;
-    }
-  }
-
-  & a:link {
-    color: #5d509e;
-    text-decoration: none;
-
-    &:hover {
-      text-decoration: underline;
-    }
-  }
-}

src/shared/initial-app/util.css

@@ -1,22 +0,0 @@
-.abs-fill {
-  position: absolute;
-  top: 0;
-  left: 0;
-  width: 100%;
-  height: 100%;
-  box-sizing: border-box;
-  contain: strict;
-}
-
-.unbutton {
-  cursor: pointer;
-  background: none;
-  border: none;
-  font: inherit;
-  padding: 0;
-  margin: 0;
-
-  &:focus {
-    outline: none;
-  }
-}

src/shared/missing-types.d.ts

@@ -13,3 +13,23 @@
 /// <reference path="../../missing-types.d.ts" />
 
 declare const __PRERENDER__: boolean;
+
+interface ResizeObserverCallback {
+  (entries: ResizeObserverEntry[], observer: ResizeObserver): void;
+}
+
+interface ResizeObserverEntry {
+  readonly target: Element;
+  readonly contentRect: DOMRectReadOnly;
+}
+
+interface ResizeObserver {
+  observe(target: Element): void;
+  unobserve(target: Element): void;
+  disconnect(): void;
+}
+
+declare var ResizeObserver: {
+  prototype: ResizeObserver;
+  new (callback: ResizeObserverCallback): ResizeObserver;
+};

src/shared/prerendered-app/Intro/blob-anim/index.ts

@@ -0,0 +1,401 @@
+import * as style from '../style.css';
+import { startBlobs } from './meta';
+
+/**
+ * Control point x,y - point x,y - control point x,y
+ */
+export type BlobPoint = [number, number, number, number, number, number];
+
+const maxPointDistance = 0.25;
+
+function randomisePoint(point: BlobPoint): BlobPoint {
+  const distance = Math.random() * maxPointDistance;
+  const angle = Math.random() * Math.PI * 2;
+  const xShift = Math.sin(angle) * distance;
+  const yShift = Math.cos(angle) * distance;
+  return [
+    point[0] + xShift,
+    point[1] + yShift,
+    point[2] + xShift,
+    point[3] + yShift,
+    point[4] + xShift,
+    point[5] + yShift,
+  ];
+}
+
+function easeInOutQuad(x: number): number {
+  return x < 0.5 ? 2 * x * x : 1 - Math.pow(-2 * x + 2, 2) / 2;
+}
+
+const rand = (min: number, max: number) => Math.random() * (max - min) + min;
+
+interface CircleBlobPointState {
+  basePoint: BlobPoint;
+  pos: number;
+  duration: number;
+  startPoint: BlobPoint;
+  endPoint: BlobPoint;
+}
+
+/** Bezier points for a seven point circle, to 3 decimal places */
+const sevenPointCircle: BlobPoint[] = [
+  [-0.304, -1, 0, -1, 0.304, -1],
+  [0.592, -0.861, 0.782, -0.623, 0.972, -0.386],
+  [1.043, -0.074, 0.975, 0.223, 0.907, 0.519],
+  [0.708, 0.769, 0.434, 0.901, 0.16, 1.033],
+  [-0.16, 1.033, -0.434, 0.901, -0.708, 0.769],
+  [-0.907, 0.519, -0.975, 0.223, -1.043, -0.074],
+  [-0.972, -0.386, -0.782, -0.623, -0.592, -0.861],
+];
+
+/*
+// Should it be needed, here's how the above was created:
+function createBezierCirclePoints(points: number): BlobPoint[] {
+  const anglePerPoint = 360 / points;
+  const matrix = new DOMMatrix();
+  const point = new DOMPoint();
+  const controlDistance = (4 / 3) * Math.tan(Math.PI / (2 * points));
+  return Array.from({ length: points }, (_, i) => {
+    point.x = -controlDistance;
+    point.y = -1;
+    const cp1 = point.matrixTransform(matrix);
+    point.x = 0;
+    point.y = -1;
+    const p = point.matrixTransform(matrix);
+    point.x = controlDistance;
+    point.y = -1;
+    const cp2 = point.matrixTransform(matrix);
+    const basePoint: BlobPoint = [cp1.x, cp1.y, p.x, p.y, cp2.x, cp2.y];
+    matrix.rotateSelf(0, 0, anglePerPoint);
+    return basePoint;
+  });
+}
+*/
+
+interface CircleBlobOptions {
+  minDuration?: number;
+  maxDuration?: number;
+  startPoints?: BlobPoint[];
+}
+
+class CircleBlob {
+  private animStates: CircleBlobPointState[];
+  private minDuration: number;
+  private maxDuration: number;
+  private points: BlobPoint[];
+
+  constructor(
+    basePoints: BlobPoint[],
+    {
+      startPoints = basePoints.map((point) => randomisePoint(point)),
+      minDuration = 4000,
+      maxDuration = 11000,
+    }: CircleBlobOptions = {},
+  ) {
+    this.points = startPoints;
+    this.minDuration = minDuration;
+    this.maxDuration = maxDuration;
+    this.animStates = basePoints.map((basePoint, i) => ({
+      basePoint,
+      pos: 0,
+      duration: rand(minDuration, maxDuration),
+      startPoint: startPoints[i],
+      endPoint: randomisePoint(basePoint),
+    }));
+  }
+
+  advance(timeDelta: number): void {
+    this.points = this.animStates.map((animState) => {
+      animState.pos += timeDelta / animState.duration;
+      if (animState.pos >= 1) {
+        animState.startPoint = animState.endPoint;
+        animState.pos = 0;
+        animState.duration = rand(this.minDuration, this.maxDuration);
+        animState.endPoint = randomisePoint(animState.basePoint);
+      }
+      const eased = easeInOutQuad(animState.pos);
+
+      const point = animState.startPoint.map((startPoint, i) => {
+        const endPoint = animState.endPoint[i];
+        return (endPoint - startPoint) * eased + startPoint;
+      }) as BlobPoint;
+
+      return point;
+    });
+  }
+
+  draw(ctx: CanvasRenderingContext2D) {
+    const points = this.points;
+    ctx.beginPath();
+    ctx.moveTo(points[0][2], points[0][3]);
+
+    for (let i = 0; i < points.length; i++) {
+      const nextI = i === points.length - 1 ? 0 : i + 1;
+      ctx.bezierCurveTo(
+        points[i][4],
+        points[i][5],
+        points[nextI][0],
+        points[nextI][1],
+        points[nextI][2],
+        points[nextI][3],
+      );
+    }
+
+    ctx.closePath();
+    ctx.fill();
+  }
+}
+
+const centralBlobsRotationTime = 120000;
+
+class CentralBlobs {
+  private rotatePos: number = 0;
+  private blobs = Array.from(
+    { length: 4 },
+    (_, i) => new CircleBlob(sevenPointCircle, { startPoints: startBlobs[i] }),
+  );
+
+  advance(timeDelta: number) {
+    this.rotatePos =
+      (this.rotatePos + timeDelta / centralBlobsRotationTime) % 1;
+    for (const blob of this.blobs) blob.advance(timeDelta);
+  }
+
+  draw(ctx: CanvasRenderingContext2D, x: number, y: number, radius: number) {
+    ctx.save();
+    ctx.translate(x, y);
+    ctx.scale(radius, radius);
+    ctx.rotate(Math.PI * 2 * this.rotatePos);
+    for (const blob of this.blobs) blob.draw(ctx);
+    ctx.restore();
+  }
+}
+
+const bgBlobsMinRadius = 20;
+const bgBlobsMaxRadius = 60;
+const bgBlobsMinAlpha = 0.1;
+const bgBlobsMaxAlpha = 0.8;
+const bgBlobsGridSize = 200;
+const bgBlobsMinSpinTime = 20000;
+const bgBlobsMaxSpinTime = 60000;
+const bgBlobsMinVelocity = 0.005;
+const bgBlobsMaxVelocity = 0.02;
+
+interface BackgroundBlob {
+  blob: CircleBlob;
+  velocity: number;
+  spinTime: number;
+  alpha: number;
+  alphaMultiplier: number;
+  rotatePos: number;
+  radius: number;
+  x: number;
+  y: number;
+}
+
+const bgBlobsAlphaTime = 2000;
+
+class BackgroundBlobs {
+  private bgBlobs: BackgroundBlob[] = [];
+  private overallAlphaPos = 0;
+
+  constructor(bounds: DOMRect) {
+    for (let x = 0; x < bounds.width; x += bgBlobsGridSize) {
+      for (let y = 0; y < bounds.height; y += bgBlobsGridSize) {
+        this.bgBlobs.push({
+          blob: new CircleBlob(sevenPointCircle, {
+            minDuration: 2000,
+            maxDuration: 5000,
+          }),
+          velocity: rand(bgBlobsMinVelocity, bgBlobsMaxVelocity),
+          alpha:
+            Math.random() ** 3 * (bgBlobsMaxAlpha - bgBlobsMinAlpha) +
+            bgBlobsMinAlpha,
+          alphaMultiplier: 1,
+          spinTime: rand(bgBlobsMinSpinTime, bgBlobsMaxSpinTime),
+          rotatePos: 0,
+          radius:
+            Math.random() ** 3 * (bgBlobsMaxRadius - bgBlobsMinRadius) +
+            bgBlobsMinRadius,
+          x: Math.random() * bgBlobsGridSize + x,
+          y: Math.random() * bgBlobsGridSize + y,
+        });
+      }
+    }
+  }
+
+  advance(
+    timeDelta: number,
+    bounds: DOMRect,
+    targetX: number,
+    targetY: number,
+    targetRadius: number,
+  ) {
+    if (this.overallAlphaPos !== 1) {
+      this.overallAlphaPos = Math.min(
+        1,
+        this.overallAlphaPos + timeDelta / bgBlobsAlphaTime,
+      );
+    }
+    for (const bgBlob of this.bgBlobs) {
+      bgBlob.blob.advance(timeDelta);
+      let dist = Math.hypot(bgBlob.x - targetX, bgBlob.y - targetY);
+      bgBlob.rotatePos = (bgBlob.rotatePos + timeDelta / bgBlob.spinTime) % 1;
+      const shiftDist = bgBlob.velocity * timeDelta;
+
+      if (dist < 10) {
+        // Move the circle out to a random edge
+        switch (Math.floor(Math.random() * 4)) {
+          case 0: // top
+            bgBlob.x = Math.random() * bounds.width;
+            bgBlob.y = -(bgBlob.radius * (1 + maxPointDistance));
+            break;
+          case 1: // left
+            bgBlob.x = -(bgBlob.radius * (1 + maxPointDistance));
+            bgBlob.y = Math.random() * bounds.height;
+            break;
+          case 2: // bottom
+            bgBlob.x = Math.random() * bounds.width;
+            bgBlob.y = bounds.height + bgBlob.radius * (1 + maxPointDistance);
+            break;
+          case 3: // right
+            bgBlob.x = bounds.width + bgBlob.radius * (1 + maxPointDistance);
+            bgBlob.y = Math.random() * bounds.height;
+            break;
+        }
+      }
+      dist = Math.hypot(bgBlob.x - targetX, bgBlob.y - targetY);
+      const direction = Math.atan2(targetX - bgBlob.x, targetY - bgBlob.y);
+      const xShift = Math.sin(direction) * shiftDist;
+      const yShift = Math.cos(direction) * shiftDist;
+      bgBlob.x += xShift;
+      bgBlob.y += yShift;
+      bgBlob.alphaMultiplier = Math.min(dist / targetRadius, 1);
+    }
+  }
+
+  draw(ctx: CanvasRenderingContext2D) {
+    const overallAlpha = easeInOutQuad(this.overallAlphaPos);
+
+    for (const bgBlob of this.bgBlobs) {
+      ctx.save();
+      ctx.globalAlpha = bgBlob.alpha * bgBlob.alphaMultiplier * overallAlpha;
+      ctx.translate(bgBlob.x, bgBlob.y);
+      ctx.scale(bgBlob.radius, bgBlob.radius);
+      ctx.rotate(Math.PI * 2 * bgBlob.rotatePos);
+      bgBlob.blob.draw(ctx);
+      ctx.restore();
+    }
+  }
+}
+
+const deltaMultiplierStep = 0.01;
+
+export function startBlobAnim(canvas: HTMLCanvasElement) {
+  let lastTime: number;
+  const ctx = canvas.getContext('2d')!;
+  const centralBlobs = new CentralBlobs();
+  let backgroundBlobs: BackgroundBlobs;
+  const loadImgEl = document.querySelector('.' + style.loadImg)!;
+  let hasFocus = document.hasFocus();
+  let deltaMultiplier = hasFocus ? 1 : 0;
+  let animating = true;
+
+  const visibilityListener = () => {
+    // 'Pause time' while page is hidden
+    if (document.visibilityState === 'visible') lastTime = performance.now();
+  };
+  const focusListener = () => {
+    hasFocus = true;
+    if (!animating) startAnim();
+  };
+  const blurListener = () => {
+    hasFocus = false;
+  };
+
+  new ResizeObserver(() => {
+    // Redraw for new canvas size
+    if (!animating) drawFrame(0);
+  }).observe(canvas);
+
+  addEventListener('focus', focusListener);
+  addEventListener('blur', blurListener);
+  document.addEventListener('visibilitychange', visibilityListener);
+
+  function destruct() {
+    removeEventListener('focus', focusListener);
+    removeEventListener('blur', blurListener);
+    document.removeEventListener('visibilitychange', visibilityListener);
+  }
+
+  function drawFrame(delta: number) {
+    const canvasBounds = canvas.getBoundingClientRect();
+    canvas.width = canvasBounds.width * devicePixelRatio;
+    canvas.height = canvasBounds.height * devicePixelRatio;
+    const loadImgBounds = loadImgEl.getBoundingClientRect();
+    const computedStyles = getComputedStyle(canvas);
+    const blobPink = computedStyles.getPropertyValue('--blob-pink');
+    const loadImgCenterX =
+      loadImgBounds.left - canvasBounds.left + loadImgBounds.width / 2;
+    const loadImgCenterY =
+      loadImgBounds.top - canvasBounds.top + loadImgBounds.height / 2;
+    const loadImgRadius = loadImgBounds.height / 2 / (1 + maxPointDistance);
+
+    ctx.scale(devicePixelRatio, devicePixelRatio);
+
+    if (!backgroundBlobs) backgroundBlobs = new BackgroundBlobs(canvasBounds);
+    backgroundBlobs.advance(
+      delta,
+      canvasBounds,
+      loadImgCenterX,
+      loadImgCenterY,
+      loadImgRadius,
+    );
+    centralBlobs.advance(delta);
+
+    ctx.globalAlpha = Number(
+      computedStyles.getPropertyValue('--center-blob-opacity'),
+    );
+    ctx.fillStyle = blobPink;
+
+    backgroundBlobs.draw(ctx);
+    centralBlobs.draw(ctx, loadImgCenterX, loadImgCenterY, loadImgRadius);
+  }
+
+  function frame(time: number) {
+    // Stop the loop if the canvas is gone
+    if (!canvas.isConnected) {
+      destruct();
+      return;
+    }
+
+    // Be kind: If the window isn't focused, bring the animation to a stop.
+    if (!hasFocus) {
+      // Bring the anim to a slow stop
+      deltaMultiplier = Math.max(0, deltaMultiplier - deltaMultiplierStep);
+      if (deltaMultiplier === 0) {
+        animating = false;
+        return;
+      }
+    } else if (deltaMultiplier !== 1) {
+      deltaMultiplier = Math.min(1, deltaMultiplier + deltaMultiplierStep);
+    }
+
+    const delta = (time - lastTime) * deltaMultiplier;
+    lastTime = time;
+
+    drawFrame(delta);
+
+    requestAnimationFrame(frame);
+  }
+
+  function startAnim() {
+    animating = true;
+    requestAnimationFrame((time: number) => {
+      lastTime = time;
+      frame(time);
+    });
+  }
+
+  startAnim();
+}

src/shared/prerendered-app/Intro/blob-anim/meta.ts

@@ -0,0 +1,41 @@
+import type { BlobPoint } from '.';
+
+/** Start points, for the shape we use in prerender */
+export const startBlobs: BlobPoint[][] = [
+  [
+    [-0.232, -1.029, 0.073, -1.029, 0.377, -1.029],
+    [0.565, -1.098, 0.755, -0.86, 0.945, -0.622],
+    [0.917, -0.01, 0.849, 0.286, 0.782, 0.583],
+    [0.85, 0.687, 0.576, 0.819, 0.302, 0.951],
+    [-0.198, 1.009, -0.472, 0.877, -0.746, 0.745],
+    [-0.98, 0.513, -1.048, 0.216, -1.116, -0.08],
+    [-0.964, -0.395, -0.774, -0.633, -0.584, -0.871],
+  ],
+  [
+    [-0.505, -1.109, -0.201, -1.109, 0.104, -1.109],
+    [0.641, -0.684, 0.831, -0.446, 1.02, -0.208],
+    [1.041, 0.034, 0.973, 0.331, 0.905, 0.628],
+    [0.734, 0.794, 0.46, 0.926, 0.186, 1.058],
+    [-0.135, 0.809, -0.409, 0.677, -0.684, 0.545],
+    [-0.935, 0.404, -1.002, 0.108, -1.07, -0.189],
+    [-0.883, -0.402, -0.693, -0.64, -0.503, -0.878],
+  ],
+  [
+    [-0.376, -1.168, -0.071, -1.168, 0.233, -1.168],
+    [0.732, -0.956, 0.922, -0.718, 1.112, -0.48],
+    [1.173, 0.027, 1.105, 0.324, 1.038, 0.621],
+    [0.707, 0.81, 0.433, 0.943, 0.159, 1.075],
+    [-0.096, 1.135, -0.37, 1.003, -0.644, 0.871],
+    [-0.86, 0.457, -0.927, 0.161, -0.995, -0.136],
+    [-0.87, -0.516, -0.68, -0.754, -0.49, -0.992],
+  ],
+  [
+    [-0.309, -0.998, -0.004, -0.998, 0.3, -0.998],
+    [0.535, -0.852, 0.725, -0.614, 0.915, -0.376],
+    [1.05, -0.09, 0.982, 0.207, 0.915, 0.504],
+    [0.659, 0.807, 0.385, 0.939, 0.111, 1.071],
+    [-0.178, 1.048, -0.452, 0.916, -0.727, 0.784],
+    [-0.942, 0.582, -1.009, 0.285, -1.077, -0.011],
+    [-1.141, -0.335, -0.951, -0.573, -0.761, -0.811],
+  ],
+];

src/shared/prerendered-app/Intro/imgs/github-logo.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 29.34 28.61"><path fill="#838383" d="M14.67 0a14.67 14.67 0 00-4.64 28.59c.74.13 1-.32 1-.7l-.02-2.74c-4.08.89-4.94-1.73-4.94-1.73a3.88 3.88 0 00-1.63-2.14c-1.33-.91.1-.9.1-.9A3.08 3.08 0 016.8 21.9a3.12 3.12 0 004.27 1.22 3.12 3.12 0 01.93-1.96c-3.26-.37-6.68-1.63-6.68-7.25a5.68 5.68 0 011.5-3.94 5.27 5.27 0 01.15-3.9S8.2 5.7 11 7.58a13.9 13.9 0 017.34 0c2.8-1.9 4.03-1.5 4.03-1.5a5.27 5.27 0 01.15 3.9 5.67 5.67 0 011.5 3.93c0 5.63-3.42 6.87-6.7 7.24a3.5 3.5 0 011 2.71l-.01 4.03c0 .39.26.85 1 .7A14.67 14.67 0 0014.67 0z"/></svg>

src/shared/prerendered-app/Intro/index.tsx

@@ -0,0 +1,382 @@
+import { h, Component } from 'preact';
+
+import { linkRef } from 'shared/prerendered-app/util';
+import '../../custom-els/loading-spinner';
+import logo from 'url:./imgs/logo.svg';
+import githubLogo from 'url:./imgs/github-logo.svg';
+import largePhoto from 'url:./imgs/demos/demo-large-photo.jpg';
+import artwork from 'url:./imgs/demos/demo-artwork.jpg';
+import deviceScreen from 'url:./imgs/demos/demo-device-screen.png';
+import largePhotoIcon from 'url:./imgs/demos/icon-demo-large-photo.jpg';
+import artworkIcon from 'url:./imgs/demos/icon-demo-artwork.jpg';
+import deviceScreenIcon from 'url:./imgs/demos/icon-demo-device-screen.jpg';
+import logoIcon from 'url:./imgs/demos/icon-demo-logo.png';
+import logoWithText from 'url:./imgs/logo-with-text.svg';
+import * as style from './style.css';
+import type SnackBarElement from 'shared/custom-els/snack-bar';
+import 'shared/custom-els/snack-bar';
+import { startBlobs } from './blob-anim/meta';
+
+const demos = [
+  {
+    description: 'Large photo',
+    size: '2.8mb',
+    filename: 'photo.jpg',
+    url: largePhoto,
+    iconUrl: largePhotoIcon,
+  },
+  {
+    description: 'Artwork',
+    size: '2.9mb',
+    filename: 'art.jpg',
+    url: artwork,
+    iconUrl: artworkIcon,
+  },
+  {
+    description: 'Device screen',
+    size: '1.6mb',
+    filename: 'pixel3.png',
+    url: deviceScreen,
+    iconUrl: deviceScreenIcon,
+  },
+  {
+    description: 'SVG icon',
+    size: '13k',
+    filename: 'squoosh.svg',
+    url: logo,
+    iconUrl: logoIcon,
+  },
+] as const;
+
+const blobAnimImport =
+  !__PRERENDER__ && matchMedia('(prefers-reduced-motion: reduce)').matches
+    ? undefined
+    : import('./blob-anim');
+const installButtonSource = 'introInstallButton-Purple';
+const supportsClipboardAPI =
+  !__PRERENDER__ && navigator.clipboard && navigator.clipboard.read;
+
+async function getImageClipboardItem(
+  items: ClipboardItem[],
+): Promise<undefined | Blob> {
+  for (const item of items) {
+    const type = item.types.find((type) => type.startsWith('image/'));
+    if (type) return item.getType(type);
+  }
+}
+
+interface Props {
+  onFile?: (file: File) => void;
+  showSnack?: SnackBarElement['showSnackbar'];
+}
+interface State {
+  fetchingDemoIndex?: number;
+  beforeInstallEvent?: BeforeInstallPromptEvent;
+  showBlobSVG: boolean;
+}
+
+export default class Intro extends Component<Props, State> {
+  state: State = {
+    showBlobSVG: true,
+  };
+  private fileInput?: HTMLInputElement;
+  private blobCanvas?: HTMLCanvasElement;
+  private installingViaButton = false;
+
+  componentDidMount() {
+    // Listen for beforeinstallprompt events, indicating Squoosh is installable.
+    window.addEventListener(
+      'beforeinstallprompt',
+      this.onBeforeInstallPromptEvent,
+    );
+
+    // Listen for the appinstalled event, indicating Squoosh has been installed.
+    window.addEventListener('appinstalled', this.onAppInstalled);
+
+    if (blobAnimImport) {
+      blobAnimImport.then((module) => {
+        this.setState(
+          {
+            showBlobSVG: false,
+          },
+          () => module.startBlobAnim(this.blobCanvas!),
+        );
+      });
+    }
+
+    // TODO: remove this
+    const demo = demos[3];
+    fetch(demo.url)
+      .then((r) => r.blob())
+      .then((blob) =>
+        this.props.onFile!(
+          new File([blob], demo.filename, { type: blob.type }),
+        ),
+      );
+  }
+
+  componentWillUnmount() {
+    window.removeEventListener(
+      'beforeinstallprompt',
+      this.onBeforeInstallPromptEvent,
+    );
+    window.removeEventListener('appinstalled', this.onAppInstalled);
+  }
+
+  private onFileChange = (event: Event): void => {
+    const fileInput = event.target as HTMLInputElement;
+    const file = fileInput.files && fileInput.files[0];
+    if (!file) return;
+    this.fileInput!.value = '';
+    this.props.onFile!(file);
+  };
+
+  private onOpenClick = () => {
+    this.fileInput!.click();
+  };
+
+  private onDemoClick = async (index: number, event: Event) => {
+    try {
+      this.setState({ fetchingDemoIndex: index });
+      const demo = demos[index];
+      const blob = await fetch(demo.url).then((r) => r.blob());
+      const file = new File([blob], demo.filename, { type: blob.type });
+      this.props.onFile!(file);
+    } catch (err) {
+      this.setState({ fetchingDemoIndex: undefined });
+      this.props.showSnack!("Couldn't fetch demo image");
+    }
+  };
+
+  private onBeforeInstallPromptEvent = (event: BeforeInstallPromptEvent) => {
+    // Don't show the mini-infobar on mobile
+    event.preventDefault();
+
+    // Save the beforeinstallprompt event so it can be called later.
+    this.setState({ beforeInstallEvent: event });
+
+    // Log the event.
+    const gaEventInfo = {
+      eventCategory: 'pwa-install',
+      eventAction: 'promo-shown',
+      nonInteraction: true,
+    };
+    ga('send', 'event', gaEventInfo);
+  };
+
+  private onInstallClick = async (event: Event) => {
+    // Get the deferred beforeinstallprompt event
+    const beforeInstallEvent = this.state.beforeInstallEvent;
+    // If there's no deferred prompt, bail.
+    if (!beforeInstallEvent) return;
+
+    this.installingViaButton = true;
+
+    // Show the browser install prompt
+    beforeInstallEvent.prompt();
+
+    // Wait for the user to accept or dismiss the install prompt
+    const { outcome } = await beforeInstallEvent.userChoice;
+    // Send the analytics data
+    const gaEventInfo = {
+      eventCategory: 'pwa-install',
+      eventAction: 'promo-clicked',
+      eventLabel: installButtonSource,
+      eventValue: outcome === 'accepted' ? 1 : 0,
+    };
+    ga('send', 'event', gaEventInfo);
+
+    // If the prompt was dismissed, we aren't going to install via the button.
+    if (outcome === 'dismissed') {
+      this.installingViaButton = false;
+    }
+  };
+
+  private onAppInstalled = () => {
+    // We don't need the install button, if it's shown
+    this.setState({ beforeInstallEvent: undefined });
+
+    // Don't log analytics if page is not visible
+    if (document.hidden) return;
+
+    // Try to get the install, if it's not set, use 'browser'
+    const source = this.installingViaButton ? installButtonSource : 'browser';
+    ga('send', 'event', 'pwa-install', 'installed', source);
+
+    // Clear the install method property
+    this.installingViaButton = false;
+  };
+
+  private onPasteClick = async () => {
+    let clipboardItems: ClipboardItem[];
+
+    try {
+      clipboardItems = await navigator.clipboard.read();
+    } catch (err) {
+      this.props.showSnack!(`No permission to access clipboard`);
+      return;
+    }
+
+    const blob = await getImageClipboardItem(clipboardItems);
+
+    if (!blob) {
+      this.props.showSnack!(`No image found in the clipboard`);
+      return;
+    }
+
+    this.props.onFile!(new File([blob], 'image.unknown'));
+  };
+
+  render(
+    {}: Props,
+    { fetchingDemoIndex, beforeInstallEvent, showBlobSVG }: State,
+  ) {
+    return (
+      <div class={style.intro}>
+        <input
+          class={style.hide}
+          ref={linkRef(this, 'fileInput')}
+          type="file"
+          onChange={this.onFileChange}
+        />
+        <div class={style.main}>
+          {!__PRERENDER__ && (
+            <canvas
+              ref={linkRef(this, 'blobCanvas')}
+              class={style.blobCanvas}
+            />
+          )}
+          <h1 class={style.logoContainer}>
+            <img
+              class={style.logo}
+              src={logoWithText}
+              alt="Squoosh"
+              width="539"
+              height="162"
+            />
+          </h1>
+          <div class={style.loadImg}>
+            {showBlobSVG && (
+              <svg
+                class={style.blobSvg}
+                viewBox="-1.25 -1.25 2.5 2.5"
+                preserveAspectRatio="xMidYMid slice"
+              >
+                {startBlobs.map((points) => (
+                  <path
+                    d={points
+                      .map((point, i) => {
+                        const nextI = i === points.length - 1 ? 0 : i + 1;
+                        let d = '';
+                        if (i === 0) {
+                          d += `M${point[2]} ${point[3]}`;
+                        }
+                        return (
+                          d +
+                          `C${point[4]} ${point[5]} ${points[nextI][0]} ${points[nextI][1]} ${points[nextI][2]} ${points[nextI][3]}`
+                        );
+                      })
+                      .join('')}
+                  />
+                ))}
+              </svg>
+            )}
+            <div
+              class={style.loadImgContent}
+              style={{ visibility: __PRERENDER__ ? 'hidden' : '' }}
+            >
+              <button class={style.loadBtn} onClick={this.onOpenClick}>
+                <svg viewBox="0 0 24 24" class={style.loadIcon}>
+                  <path d="M19 7v3h-2V7h-3V5h3V2h2v3h3v2h-3zm-3 4V8h-3V5H5a2 2 0 00-2 2v12c0 1.1.9 2 2 2h12a2 2 0 002-2v-8h-3zM5 19l3-4 2 3 3-4 4 5H5z" />
+                </svg>
+              </button>
+              <div>
+                <span class={style.dropText}>Drop </span>OR{' '}
+                {supportsClipboardAPI ? (
+                  <button class={style.pasteBtn} onClick={this.onPasteClick}>
+                    Paste
+                  </button>
+                ) : (
+                  'Paste'
+                )}
+              </div>
+            </div>
+          </div>
+        </div>
+        <div class={style.demosContainer}>
+          <svg viewBox="0 0 1920 140" class={style.topWave}>
+            <path
+              d="M1920 0l-107 28c-106 29-320 85-533 93-213 7-427-36-640-50s-427 0-533 7L0 85v171h1920z"
+              class={style.subWave}
+            />
+            <path
+              d="M0 129l64-26c64-27 192-81 320-75 128 5 256 69 384 64 128-6 256-80 384-91s256 43 384 70c128 26 256 26 320 26h64v96H0z"
+              class={style.mainWave}
+            />
+          </svg>
+          <div class={style.contentPadding}>
+            <p class={style.demoTitle}>
+              Or <strong>try one</strong> of these:
+            </p>
+            <ul class={style.demos}>
+              {demos.map((demo, i) => (
+                <li>
+                  <button
+                    class="unbutton"
+                    onClick={(event) => this.onDemoClick(i, event)}
+                  >
+                    <div>
+                      <div class={style.demoIconContainer}>
+                        <img
+                          class={style.demoIcon}
+                          src={demo.iconUrl}
+                          alt={demo.description}
+                        />
+                        {fetchingDemoIndex === i && (
+                          <div class={style.demoLoader}>
+                            <loading-spinner />
+                          </div>
+                        )}
+                      </div>
+                      <div class={style.demoSize}>{demo.size}</div>
+                    </div>
+                  </button>
+                </li>
+              ))}
+            </ul>
+          </div>
+        </div>
+        <div class={style.footer}>
+          <svg viewBox="0 0 1920 79" class={style.topWave}>
+            <path
+              d="M0 59l64-11c64-11 192-34 320-43s256-5 384 4 256 23 384 34 256 21 384 14 256-30 320-41l64-11v94H0z"
+              class={style.footerWave}
+            />
+          </svg>
+          <div class={style.contentPadding}>
+            <footer class={style.footerItems}>
+              <a
+                class={style.footerLink}
+                href="https://github.com/GoogleChromeLabs/squoosh/blob/dev/README.md#privacy"
+              >
+                Privacy
+              </a>
+              <a
+                class={style.footerLinkWithLogo}
+                href="https://github.com/GoogleChromeLabs/squoosh"
+              >
+                <img src={githubLogo} alt="" width="10" height="10" />
+                Source on Github
+              </a>
+            </footer>
+          </div>
+        </div>
+        {beforeInstallEvent && (
+          <button class={style.installBtn} onClick={this.onInstallClick}>
+            Install
+          </button>
+        )}
+      </div>
+    );
+  }
+}

src/shared/prerendered-app/Intro/missing-types.d.ts

@@ -29,3 +29,12 @@ interface BeforeInstallPromptEvent extends Event {
 interface WindowEventMap {
   beforeinstallprompt: BeforeInstallPromptEvent;
 }
+
+interface ClipboardItem {
+  types: string[];
+  getType(type: string): Promise<Blob>;
+}
+
+interface Clipboard {
+  read(): Promise<ClipboardItem[]>;
+}

src/shared/prerendered-app/Intro/style.css

@@ -0,0 +1,243 @@
+.intro {
+  composes: abs-fill from global;
+  -webkit-overflow-scrolling: touch;
+  overflow: auto;
+  overscroll-behavior: contain;
+  display: grid;
+  grid-template-rows: 1fr max-content max-content;
+  font-size: 1.2rem;
+  color: var(--dark-text);
+}
+
+.blob-canvas {
+  composes: abs-fill from global;
+  width: 100%;
+  height: 100%;
+}
+
+.hide {
+  display: none;
+}
+
+.main {
+  min-height: 541px;
+  display: grid;
+  grid-template-rows: max-content max-content;
+  justify-items: center;
+  position: relative;
+  --blob-pink: var(--hot-pink);
+  --center-blob-opacity: 0.3;
+
+  @media (min-width: 600px) {
+    min-height: 688px;
+  }
+}
+
+.logo-container {
+  margin: 5rem 0 1rem;
+}
+
+.logo {
+  transform: translate(-1%, 0);
+  width: 189px;
+  height: auto;
+}
+
+.load-img {
+  position: relative;
+  color: var(--white);
+  font-style: italic;
+  font-size: 1.2rem;
+}
+
+.blob-svg {
+  composes: abs-fill from global;
+  width: 100%;
+  height: 100%;
+  fill: var(--blob-pink);
+
+  & path {
+    opacity: var(--center-blob-opacity);
+  }
+}
+
+.load-img-content {
+  position: relative;
+  --size: 29rem;
+  max-width: var(--size);
+  width: 100vw;
+  height: var(--size);
+  display: grid;
+  grid-template-rows: max-content max-content;
+  justify-items: center;
+  align-content: center;
+  gap: 0.7rem;
+
+  @media (min-width: 600px) {
+    --size: 36rem;
+  }
+}
+
+.load-btn {
+  composes: unbutton from global;
+}
+
+.load-icon {
+  --size: 5rem;
+  width: var(--size);
+  height: var(--size);
+  fill: var(--white);
+  transform: translate(4.3%, -1%);
+}
+
+.paste-btn {
+  composes: unbutton from global;
+  text-decoration: underline;
+  font: inherit;
+  color: inherit;
+}
+
+.demos-container {
+  position: relative;
+  background: var(--deep-blue);
+  padding-bottom: 5.2vw;
+}
+
+.top-wave {
+  position: absolute;
+  left: 0;
+  right: 0;
+  bottom: 100%;
+}
+
+.main-wave {
+  fill: var(--deep-blue);
+}
+
+.sub-wave {
+  fill: var(--light-blue);
+}
+
+.footer {
+  position: relative;
+  background: var(--light-gray);
+}
+
+.footer-wave {
+  fill: var(--light-gray);
+}
+
+.content-padding {
+  padding: 2rem;
+}
+
+.footer-items {
+  display: grid;
+  justify-content: end;
+  grid-auto-columns: max-content;
+  grid-auto-flow: column;
+  align-items: center;
+  gap: 4rem;
+}
+
+.footer-link {
+  text-decoration: none;
+  color: inherit;
+}
+
+.footer-link-with-logo {
+  composes: footer-link;
+  display: grid;
+  grid-template-columns: 1.8em max-content;
+  align-items: center;
+  gap: 0.6em;
+
+  img {
+    width: 100%;
+    height: auto;
+  }
+}
+
+@keyframes fade-in {
+  from {
+    opacity: 0;
+  }
+}
+
+.install-btn {
+  composes: unbutton from global;
+  position: absolute;
+  top: 1rem;
+  right: 1rem;
+  background: var(--deep-blue);
+  border-radius: 0.4em;
+  color: var(--white);
+  padding: 0.5em 1em;
+  font-size: 1.6rem;
+  animation: fade-in 600ms ease-in-out;
+}
+
+.demo-title {
+  color: var(--white);
+  margin: 0;
+  font-size: 2rem;
+  text-align: center;
+}
+
+.demos {
+  display: grid;
+  gap: 3rem;
+  justify-items: center;
+  justify-content: center;
+  padding: 0;
+  margin: 3rem auto;
+  --demo-size: 80px;
+  grid-template-columns: repeat(auto-fit, var(--demo-size));
+
+  @media (min-width: 740px) {
+    --demo-size: 100px;
+    gap: 6rem;
+  }
+
+  & > li {
+    display: block;
+  }
+}
+
+.demo-size {
+  background: var(--dim-blue);
+  border-radius: 1000px;
+  color: var(--white);
+  width: max-content;
+  padding: 0.5rem 1.2rem;
+  margin: 0.7rem auto 0;
+}
+
+.demo-icon-container {
+  border-radius: var(--demo-size);
+  position: relative;
+  overflow: hidden;
+}
+.demo-icon {
+  width: var(--demo-size);
+  height: var(--demo-size);
+  display: block;
+}
+.demo-loader {
+  composes: abs-fill from global;
+  background: rgba(0, 0, 0, 0.5);
+  display: grid;
+  justify-content: center;
+  align-content: center;
+  animation: fade-in 600ms ease-in-out;
+
+  & > loading-spinner {
+    --color: var(--white);
+  }
+}
+
+.drop-text {
+  @media (max-width: 599px) {
+    display: none;
+  }
+}

src/shared/prerendered-app/colors.css

@@ -0,0 +1,21 @@
+html {
+  --pink: #ff3385;
+  --hot-pink: #ff0066;
+  --white: #fff;
+  --black: #000;
+  --blue: #5fb4e4;
+  --dim-blue: #0a7bcc;
+  --deep-blue: #09f;
+  --light-blue: #76c8ff;
+  --light-gray: #eaeaea;
+  --dark-text: #343a3e;
+
+  /* Old stuff: */
+  --gray-dark: rgba(0, 0, 0, 0.8);
+
+  --button-fg-color: 95, 180, 228;
+  --button-fg: rgb(95, 180, 228);
+
+  --negative: rgb(207, 113, 127);
+  --positive: rgb(149, 212, 159);
+}

src/shared/prerendered-app/util.css

@@ -0,0 +1,24 @@
+:global {
+  .abs-fill {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    box-sizing: border-box;
+    contain: strict;
+  }
+
+  .unbutton {
+    cursor: pointer;
+    background: none;
+    border: none;
+    font: inherit;
+    padding: 0;
+    margin: 0;
+
+    &:focus {
+      outline: none;
+    }
+  }
+}

src/static-build/missing-types.d.ts

@@ -11,7 +11,7 @@
  * limitations under the License.
  */
 /// <reference path="../../missing-types.d.ts" />
-/// <reference path="../shared/initial-app/Intro/missing-types.d.ts" />
+/// <reference path="../shared/prerendered-app/Intro/missing-types.d.ts" />
 
 declare module 'client-bundle:*' {
   const url: string;

src/static-build/pages/index/base.css

@@ -25,8 +25,8 @@ body {
   height: 100%;
   padding: 0;
   margin: 0;
-  font: 12px/1.3 system-ui, -apple-system, BlinkMacSystemFont, Roboto, Helvetica,
+  font: 12px/1.3 'HelveticaNeue-Light', 'Helvetica Neue Light', 'Helvetica Neue',
-    sans-serif;
+    Helvetica, Arial, 'Lucida Grande', sans-serif;
   overflow: hidden;
   overscroll-behavior: none;
   contain: strict;
@@ -34,16 +34,6 @@ body {
   background-size: 20px 20px;
 }
 
-:root {
-  --gray-dark: rgba(0, 0, 0, 0.8);
-
-  --button-fg-color: 95, 180, 228;
-  --button-fg: rgb(95, 180, 228);
-
-  --negative: rgb(207, 113, 127);
-  --positive: rgb(149, 212, 159);
-}
-
 :global(#app) {
   position: absolute;
   left: 0;

src/static-build/pages/index/index.tsx

@@ -17,7 +17,7 @@ import initialCss from 'initial-css:';
 import { allSrc } from 'client-bundle:client/initial-app';
 import favicon from 'url:static-build/assets/favicon.ico';
 import { escapeStyleScriptContent } from 'static-build/utils';
-import Intro from 'shared/initial-app/Intro';
+import Intro from 'shared/prerendered-app/Intro';
 
 interface Props {}