polyfills

I want to enable image (& audio & video) uploads in a survey framework. To do so, input file is nearly sufficient for my purposes. On some mobile browsers <input type="file" accept="image/*;capture=camera"> is a really simple way of letting users choose to upload an existing image or to take a new one. Of course the UI for viewing and choosing among the pictures is provided too. Desktop browsers did not go this route. Instead, some pretty nice stuff seems to be possible using getUserMedia() . I did not find any working examples that upload the collected user-media to the server (e.g. I found

I am trying to understand Redux online tutorials that are posted by Dan Abramov. At present I am on the following sample: Reducer composition with Arrays Here is my practice code following the above sample: // Individual TODO Reducer const todoReducer = (state, action) => { switch(action.type) { case 'ADD_TODO': return { id: action.id, text: action.text, completed: false }; case 'TOGGLE_TODO': if (state.id != action.id) return state; // This not working /* return { ...state, completed: !state.completed }; */ //This works var newState = {id: state.id, text: state.text, completed: !state

I have a dependency (vue2-google-maps) which is causing issues with my Vue app in older browsers, throwing an error with Object.entries . Reading the Vue CLI Docs on polyfills , I see it mention trying to load the polyfill in babel.config.js . My babel.config.js : module.exports = { presets: [ ['@vue/app', { polyfills: [ 'es6.object' ] }] ] } Throws an error: Module build failed (from ./node_modules/babel-loader/lib/index.js): TypeError: [BABEL] /PROJECT_DIR/src/main.js: Cannot read property 'android' of undefined (While processing: "/PROJECT_DIR/node_modules/@vue/babel-preset-app/index.js")

I've been looking at some of the popular console.log() wrappers/polyfills: Paul Irish's Ben Alman's Craig Patik's I notice that all of them accept multiple arguments , but they all do something like this: console.log(arguments); Which results in output like this (in Chrome): Whereas, at least in a modern browser like Chrome or Firefox, console.log() also accepts multiple arguments, so that this would produce (IMHO) superior output: console.log.apply(console, arguments) Which results in output like this (in Chrome): Is there any particular reason why I should avoid using console.log.apply()

How would I add code of a polyfill in a Angular 2 cli-project? For example, I would like to use the following polyfill from Mozilla MDN : if (!Array.prototype.includes) { Object.defineProperty(Array.prototype, 'includes', { value: function(searchElement, fromIndex) { if (this == null) { throw new TypeError('"this" is null or not defined'); } var o = Object(this); var len = o.length >>> 0; if (len === 0) { return false; } var n = fromIndex | 0; var k = Math.max(n >= 0 ? n : len - Math.abs(n), 0); while (k < len) { if (o[k] === searchElement) { return true; } k++; } return false; } }); } I found

I've been piecing together support for IE11 by adding plugins for transform-object-assign and array-includes and now I'm getting a symbol error for using for of loops. Instead of just tackling them one at a time, is it possible for me to work babel polyfill into my build below and future proof it? I've read several related questions but still am not clear on how I'd fit babel-polyfill into the gulp build below: return gulp.src(input) // Grab the input files .pipe($.babel({ presets: ['es2015'], // transform ES6 to ES5 with Babel plugins: ['transform-object-assign','array-includes'] })) .pipe($

When I want to start my angular 2 app using "npm start". I get errors: I tried a lot of "solutions" from internet, but nothing works. My versions: npm - 4.1.2 typings - 2.1.0 node - 7.5.0 tsconfig.json { "compilerOptions": { "target": "es6", "module": "commonjs", "moduleResolution": "node", "sourceMap": true, "emitDecoratorMetadata": true, "experimentalDecorators": true, "lib": ["es2015", "dom"], "noImplicitAny": true, "suppressImplicitAnyIndexErrors": true } } polyfills.ts import 'core-js/es6'; import 'core-js/es7/reflect'; require('zone.js/dist/zone'); if (process.env.ENV === 'production') {