Which placeholder polyfill script do you recommend that I use to provide placeholder support in ie7, 8 & 9.  I've seen the following list from the modernizer team and was wondering if anybody here had some mileage with them or any others not...
I just started to use Babel to compile my ES6 javascript code into ES5. When I start to use Promises it looks like it's not working. The Babel website states support for promises via polyfills.  Without any luck, I tried to add:  require("bab...
I'm using browser's native fetch API for network requests. Also I am using the whatwg-fetch polyfill for unsupported browsers.   However I need to retry in case the request fails. Now there is this npm package whatwg-fetch-retry I found, but...
I know that when a function returned by Function.prototype.bind is called as a constructor, the pre-bound this is ignored. This is the behaviour specified in ECMA-262, and the behaviour that MDN polyfill implements. My question is: how that polyfill...
What is the difference between a shim an a sham?  Is it enough to include es5-shim.min.js and es6-shim.min.js or should I also include es5-sham.min.js and es6-sham.min.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);...
I've got an angular 2 app working inside firefox and chrome, not so much inside (sigh) IE. Based on my stack trace, it looks like there is a problem with my System js setup.  Here is the error description that I see inside my web console.  Error:...
After reading the article Removing Babel's Stage Presets by babel, I still not fully understand how to add a proposal from, for example, stage-3 (flatMap) to .babelrc.  As far as I understand, because flatMap can be written in ES5, then I need a...
I am trying to use the File API library (https://github.com/mailru/FileAPI) as a fallback for browsers which do not support the File API, in order to read a file as a Data URL and pass that on to another function.   I have this code:  function handle...
I try to make a simple web component.  For browser compatibility, I use the NPM package webcomponents.js (version 0.7.23). I run my little code with Polyserve.  My code is on Github: https://github.com/olofweb/Webcomponents   On Chrome (version 55) -...

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