TypeScript does not auto-polyfill code (see microsoft/TypeScript#3101). The “official” reason from the relevant GitHub issue seems to be, as @RyanCavanaugh said: Having the compiler try to figure out which [ES20XX] methods you need, and where to emit them, and when, with controls for people who don’t want the polyfills emitted, and ways to change where … Read more
I recommend you use the jQuery Placeholder polyfill by Mathias Bynens. It supports IE6+ It is 2k minified It does its own feature detection (Modernizr isn’t needed) The code is straightforward. The jQuery selection will vary depending on your selector It is the one polyfill recommended by HTML5Please and is listed on the Modernizr Wiki … Read more
This changed a bit in babel v6. From the docs: The polyfill will emulate a full ES6 environment. This polyfill is automatically loaded when using babel-node. Installation: $ npm install babel-polyfill Usage in Node / Browserify / Webpack: To include the polyfill you need to require it at the top of the entry point to … Read more
From the fetch docs : fetch(“https://stackoverflow.com/users”) .then(checkStatus) .then(parseJSON) .then(function(data) { console.log(‘succeeded’, data) }).catch(function(error) { console.log(‘request failed’, error) }) See that catch? Will trigger when fetch fails, you can fetch again there. Have a look at the Promise API. Implementation example: function wait(delay){ return new Promise((resolve) => setTimeout(resolve, delay)); } function fetchRetry(url, delay, tries, fetchOptions = … Read more
React is not compatible right away with IE, From the official documentation : React supports all popular browsers, including Internet Explorer 9 and above, although some polyfills are required for older browsers such as IE 9 and IE 10. We don’t support older browsers that don’t support ES5 methods, but you may find that your … Read more
A polyfill is a browser fallback, made in JavaScript, that allows functionality you expect to work in modern browsers to work in older browsers, e.g., to support canvas (an HTML5 feature) in older browsers. It’s sort of an HTML5 technique, since it is used in conjunction with HTML5, but it’s not part of HTML5, and … Read more
If you want this type of code to run in IE11 (which does not support much of ES6 at all), then you need to get a 3rd party promise library (like Bluebird), include that library and change your coding to use ES5 coding structures (no arrow functions, no let, etc…) so you can live within … Read more
Yes, so long as you’re processing root-level custom properties (IE9+). GitHub: https://github.com/jhildenbiddle/css-vars-ponyfill NPM: https://www.npmjs.com/package/css-vars-ponyfill Demo: https://codepen.io/jhildenbiddle/pen/ZxYJrR From the README: Features Client-side transformation of CSS custom properties to static values Live updates of runtime values in both modern and legacy browsers Transforms <link>, <style>, and @import CSS Transforms relative url() paths to absolute URLs Supports chained … Read more
According to this issue reply You need to follow the following steps Create a new tsconfig tsconfig.es5.json next to tsconfig.json with the below contents { “extends”: “./tsconfig.json”, “compilerOptions”: { “target”: “es5” } } In angular.json Under projects:yourAppName:architect:build:configurations, add “es5”: { “tsConfig”: “./tsconfig.es5.json” } and projects:yourAppName:architect:serve:configurations add “es5”: { “browserTarget”: “yourAppName:build:es5” } Remember to change yourAppName … Read more