I have been working on a project and developing a JavaScript framework. The original code is about 700 lines so I only pasted this line. The includes method doesn't work on Internet Explorer. Is there any solution for this?  var row_cells = tbl_r...
Given   var arr = [1,2,true,4,{"abc":123},6,7,{"def":456},9,[10]]   we can filter number items within array arr using Number constructor  var res = arr.filter(Number); // [1, 2, true, 4, 6, 7, 9, Array[1]]   are true and [10] expected...
I'm using babeljs with es7 style async/await methods.  I have a main script that will call a async method on an array of objects that all return promises.  I use Promise.all() to wait for all of those to return, however, these tasks could take a...
I've just discovered the ECMAScript 7 feature a**b as an alternative for Math.pow(a,b) (MDN Reference) and came across a discussion in that post, in which they apparently behave differently. I've tested it in Chrome 55 and can confirm that th...
I'm trying to do something like the following, however it returns null:  import { Button as styledButton } from 'component-library'   then attempting to render it as:  import React, { PropTypes } from "react"; import cx from '...
There are already a lot of cool features in ES6/ES7 for defining Javascript objects. However, the following pattern is common in Javascript:  const obj = {    requiredKey1: ...,    requiredKey2: ...  };  if (someCondition) {    obj.optionalKey1 = ......
I'm trying to use javascript ES7 syntax on the server using node.js with webpack and babel-loader (es2015 + stage-0 presets). I've gotten it to work with babel-node but when I run webpack I get the following error at the async keyword (9:22 i...
There is _.merge functionality in lodash. I want to achieve the same thing in ES6 or ES7.  Having this snippet:  Object.assign({}, {key: 2}, {key: undefined})   I want to receive {key: 2}. Currently I receive {key: undefined}  This is NOT a deep merg...
I was surprised to find that in Babel, I could have two modules import each other without any issues. I have found a few places that refer to this as a known and expected behaviour in Babel. I know that this is widely considered an anti-pattern by a...

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