browsers, hassle-free. Babeljs comes with a wide range of features in the form of plugins, presets, polyfills, etc. In short, Babeljs is a toolset which has all the required tools available with it and which want the code to be converted. For example, es2015 preset will convert the code to es5. ## Babel-Polyfills There are some features like methods and objects, which cannot be transpiled. At such instances us consider the example of promises; for the feature to work in older browsers, we need to use polyfills. ## Babel-cli Babel-cli comes with a bunch of commands where the code can be easily compiled on

"crypto" IN WEBPACK. EVEN node_modules CAN USE THAT. ## NODE CORE MODULE POLYFILLS • PROBLEM: THESE NODE.JS CORE MODULE POLYFILLS ARE OFTEN LARGE • MINIMIZED SIZE: • CRYPTO: 301KB • zLIB: 128KB • STREAM: NODE CORE MODULE POLYFILLS • PROBLEM: DEVELOPERS OFTEN UNAWARE OF THE USED NODE CORE MODULE POLYFILLS. • PROBLEM: It's too easy to accidentally include them. • PROBLEM: POLYFILLS DIFFER FROM NODE MODULES RESULT IN BREAKING CHANGES IN POLYFILLS AND NEED TO RESULT IN A MAJOR WEBPACK RELEASE • PROBLEM: POLYFILLS ARE OFTEN OUTDATED. ## NODE CORE MODULE POLYFILLS REMOVED • MIGRATION: • AVOID USING

dex.html (300 bytes) CREATE TutorialsPoint/src/main.ts (372 bytes) CREATE TutorialsPoint/src/polyfills.ts (2835 bytes) CREATE TutorialsPoint/src/styles.css (80 bytes) CREATE TutorialsPoint/src/test |24|--poll|Enable and define the file watching poll time period in milliseconds.| |25|--polyfills=polyfills|The full path for the polyfills file, relative to the current workspace.| |26|--preserveSymlinks=true\|false|Do for differential loading... ES5 bundle generation complete. chunk {polyfills} polyfills-es2015.js, polyfills-es2015.js.map (polyfills) 141 kB [initial] [rendered] chunk {runtime} runtime-es2015.js, runtime-es2015

the application. The structure of the application is as follows: favicon.ico index.html main.ts polyfills.ts styles.css +---app app.component.css app.component.html app.component.spec.ts app.component application. • favicon.ico and assets are application’s icon and application’s root asset folder. • polyfills.ts contains standard code useful for browser compatibility. - environments folder will have the chunk {main} main.js, main.js.map (main) 49.2 kB [initial] [rendered] chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 269 kB [initial] [rendered] chunk {runtime} runtime.js, runtime.js.map (runtime)

Vorlon.js 判断某浏览器是否支持某功能的浏览器编码工具： • Feature.js • Modernizr 多样的浏览器Polyfills/Shims: console-polyfill • HTML5 Cross Browser Polyfills • fetch • socket.io • SockJS • webcomponents.js • webshim 浏览器托管测试、托管自动化： HTML 用户界面浏览器支持 MDN 文档对象模型 (DOM) MDN 文档对象模型 MDN 文档对象模型 MDN 事件参考资料 MSDN 文档对象模型 (DOM) ## DOM Polyfills / Shims: • dom-shims - 鼠标事件 Polyfill: Web 平台统一事件系统 虚拟 DOM: • jsdom • virtual-dom ## JavaScript Animate • Anime • Animista.net • Dynamics.js • GreenSock-JS Magic • TweenJS • Velocity.js ## Polyfills/Shims: • web-animations-js 动画参考资料： • canianimate.com ## JSON 工具 在线编辑工具： • JSONmate json.browse()

MERGED ## CATEGORIES • HOTNESS/BENEFIT: • RISK OF BREAKING: ☐ ☐ ☐ • RISK OF BUGS: ☐☐☐☐ ## NODE POLYFILLS require("crypto"); import crypto from "crypto"; ## WEBPACK 4 • COMPILED SUCCESSFUL JS-LESS CHUNKS • SPLIT CHUNKS – MIN REMAINING SIZE • MAX SIZE FOR INITIAL AND ASYNC • Node Polyfills  • SOURCE TYPES

[rendered] chunk {main} main.bundle.js (main) 23.6 kB [initial] [rendered] chunk {polyfills} polyfills.bundle.js (polyfills) 560 kB [initial] [rendered] chunk {styles} styles.bundle.js (styles) 293 kB [initial]

c94a17baf10c/p21_1.jpg) NO LONGER FOCUS ON NODE.JS COMPATIBILITY NO NODE.JS BUILT-IN MODULE POLYFILLS  NEW SPECS JSON

AT BUILD-TIME AND EMBEDS MAPPINGS INTO A CONTEXT MODULE ## 2012 : CONTINUED DEVELOPMENT • ADDED POLYFILLS FOR SOME NODE.JS MODULES • MORE WILL BE ADDED LATER • ADDED LOADERS ![Image](/uploads/docu

existing JavaScript standard.” <

			Compilers/polyfills
	97%	56%	71%	48%	59%	18%