web worker js code refactoring

update example add React App example
Donaldcwl · Mar 16, 2020 · fbbbadb · fbbbadb
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diff --git a/dist/browser-image-compression.js b/dist/browser-image-compression.js
diff --git a/dist/browser-image-compression.js.map b/dist/browser-image-compression.js.map
diff --git a/dist/browser-image-compression.mjs b/dist/browser-image-compression.mjs
diff --git a/dist/browser-image-compression.mjs.map b/dist/browser-image-compression.mjs.map
diff --git a/example/React App/package.json b/example/React App/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "my-image-app",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "@testing-library/jest-dom": "^4.2.4",
+    "@testing-library/react": "^9.3.2",
+    "@testing-library/user-event": "^7.1.2",
+    "react": "^16.13.0",
+    "react-dom": "^16.13.0",
+    "react-scripts": "3.4.0"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": "react-app"
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}
diff --git a/example/React App/public/favicon.ico b/example/React App/public/favicon.ico
diff --git a/example/React App/public/index.html b/example/React App/public/index.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <meta
+      name="description"
+      content="Web site created using create-react-app"
+    />
+    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
+    <!--
+      manifest.json provides metadata used when your web app is installed on a
+      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>
diff --git a/example/React App/public/logo192.png b/example/React App/public/logo192.png
diff --git a/example/React App/public/logo512.png b/example/React App/public/logo512.png
diff --git a/example/React App/public/manifest.json b/example/React App/public/manifest.json
@@ -0,0 +1,25 @@
+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "logo192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "logo512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}
diff --git a/example/React App/public/robots.txt b/example/React App/public/robots.txt
@@ -0,0 +1,3 @@
+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
+Disallow:
diff --git a/example/React App/src/App.css b/example/React App/src/App.css
@@ -0,0 +1,19 @@
+.App {
+    font-family: sans-serif;
+}
+
+table,
+th,
+td {
+    border: 1px solid black;
+    border-collapse: collapse;
+}
+
+td {
+    vertical-align: top;
+    width: 50%;
+}
+
+img {
+    max-width: 100%;
+}
diff --git a/example/React App/src/App.js b/example/React App/src/App.js
@@ -0,0 +1,153 @@
+import React from 'react'
+import './App.css'
+import imageCompression from 'browser-image-compression'
+
+export default class App extends React.Component {
+  constructor (...args) {
+    super(...args)
+    this.compressImage = this.compressImage.bind(this)
+    this.handleChange = this.handleChange.bind(this)
+    this.state = {
+      maxSizeMB: 1,
+      maxWidthOrHeight: 1024,
+      webWorker: {
+        progress: null,
+        inputSize: null,
+        outputSize: null,
+        inputUrl: null,
+        outputUrl: null
+      },
+      mainThread: {
+        progress: null,
+        inputSize: null,
+        outputSize: null,
+        inputUrl: null,
+        outputUrl: null
+      }
+    }
+  }
+
+  handleChange (target) {
+    return (e) => {
+      this.setState({ [target]: e.currentTarget.value })
+    }
+  }
+
+  onProgress (p, useWebWorker) {
+    const targetName = useWebWorker ? 'webWorker' : 'mainThread'
+    this.setState(prevState => ({
+      ...prevState,
+      [targetName]: {
+        ...prevState[targetName],
+        progress: p
+      }
+    }))
+  }
+
+  async compressImage (event, useWebWorker) {
+    const file = event.target.files[0]
+    console.log('input', file)
+    console.log(
+      'ExifOrientation',
+      await imageCompression.getExifOrientation(file)
+    )
+    const targetName = useWebWorker ? 'webWorker' : 'mainThread'
+    this.setState(prevState => ({
+      ...prevState,
+      [targetName]: {
+        ...prevState[targetName],
+        inputSize: (file.size / 1024 / 1024).toFixed(2),
+        inputUrl: URL.createObjectURL(file)
+      }
+    }))
+    var options = {
+      maxSizeMB: this.state.maxSizeMB,
+      maxWidthOrHeight: this.state.maxWidthOrHeight,
+      useWebWorker,
+      onProgress: p => this.onProgress(p, useWebWorker)
+    }
+    const output = await imageCompression(file, options)
+    console.log('output', output)
+    this.setState(prevState => ({
+      ...prevState,
+      [targetName]: {
+        ...prevState[targetName],
+        outputSize: (output.size / 1024 / 1024).toFixed(2),
+        outputUrl: URL.createObjectURL(output)
+      }
+    }))
+  }
+
+  render () {
+    const { webWorker, mainThread, maxSizeMB, maxWidthOrHeight } = this.state
+    return (
+      <div className="App">
+        <div>
+          Options:<br />
+          <label htmlFor="maxSizeMB">maxSizeMB: <input type="number" id="maxSizeMB" name="maxSizeMB"
+                                                       value={maxSizeMB}
+                                                       onChange={this.handleChange('maxSizeMB')} /></label><br />
+          <label htmlFor="maxWidthOrHeight">maxWidthOrHeight: <input type="number" id="maxWidthOrHeight"
+                                                                     name="maxWidthOrHeight"
+                                                                     value={maxWidthOrHeight}
+                                                                     onChange={this.handleChange('maxWidthOrHeight')} /></label>
+          <hr />
+          <label htmlFor="web-worker">
+            Compress in web-worker{' '}
+            {webWorker.progress && <span>{webWorker.progress} %</span>}
+            <input
+              id="web-worker"
+              type="file"
+              accept="image/*"
+              onChange={e => this.compressImage(e, true)}
+            />
+          </label>
+          <p>
+            {webWorker.inputSize && (
+              <span>Source image size: {webWorker.inputSize} mb</span>
+            )}
+            {webWorker.outputSize && (
+              <span>, Output image size: {webWorker.outputSize}</span>
+            )}
+          </p>
+        </div>
+        <div>
+          <label htmlFor="main-thread">
+            Compress in main-thread{' '}
+            {mainThread.progress && <span>{mainThread.progress} %</span>}
+            <input
+              id="main-thread"
+              type="file"
+              accept="image/*"
+              onChange={e => this.compressImage(e, false)}
+            />
+          </label>
+          <p>
+            {mainThread.inputSize && (
+              <span>Source image size: {mainThread.inputSize} mb</span>
+            )}
+            {mainThread.outputSize && (
+              <span>, Output image size: {mainThread.outputSize}</span>
+            )}
+          </p>
+        </div>
+        {(mainThread.inputUrl || webWorker.inputUrl) && (
+          <table>
+            <thead>
+            <tr>
+              <td>input preview</td>
+              <td>output preview</td>
+            </tr>
+            </thead>
+            <tbody>
+            <tr>
+              <td><img src={mainThread.inputUrl || webWorker.inputUrl} alt="input" /></td>
+              <td><img src={mainThread.outputUrl || webWorker.outputUrl} alt="output" /></td>
+            </tr>
+            </tbody>
+          </table>
+        )}
+      </div>
+    )
+  }
+};
diff --git a/example/React App/src/index.css b/example/React App/src/index.css
@@ -0,0 +1,13 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}
diff --git a/example/React App/src/index.js b/example/React App/src/index.js
@@ -0,0 +1,12 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './App';
+import * as serviceWorker from './serviceWorker';
+
+ReactDOM.render(<App />, document.getElementById('root'));
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: https://bit.ly/CRA-PWA
+serviceWorker.unregister();
diff --git a/example/React App/src/logo.svg b/example/React App/src/logo.svg