ecmascript-7

This question already has an answer here: Unable to access React instance (this) inside event handler 18 answers I'm getting this error Uncaught TypeError: Cannot read property 'state' of undefined whenever I type anything in the input box of AuthorForm. I'm using React with ES7. The error occurs on 3rd line of setAuthorState function in ManageAuthorPage . Regardless of that line of code even if I put a console.log(this.state.author) in setAuthorState, it will stop at the console.log and call out the error. Can't find similar issue for someone else over the internet. Here is the

I'm hearing that VS 2015 is supporting the new js syntax but when I open up a project written using aurelia.js in this IDE intellisense complains about many, many things eg. export class UpperValueConverter { toView(value){ return value && value.toUpperCase(); } } I have the WebEssentials 2015 installed. Still nothing seems to work... Probably an important information is that my current VS installation is a fresh one, so I didn't mess up any settings. I was having this problem in .jsx files, visual studio 2015 was using the react-tools plugin to parse and highlight the syntax errors. I can't

I'd like to be able to await on an observable, e.g. const source = Rx.Observable.create(/* ... */) //... await source; A naive attempt results in the await resolving immediately and not blocking execution Edit: The pseudocode for my full intended usecase is: if (condition) { await observable; } // a bunch of other code I understand that I can move the other code into another separate function and pass it into the subscribe callback, but I'm hoping to be able to avoid that. You have to pass a promise to await . Convert the observable's next event to a promise and await that. if (condition) {

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 in resulting array ? If we substitute false for true at arr var arr = [1,2,false,4,{"abc":123},6,7,{"def":456},9,[10]] var res = arr.filter(Number) // [1, 2, 4, 6, 7, 9, Array[1]] using Array.isArray var res = arr.filter(Array.isArray) // [Array[1]] String var res = arr.filter(String) // [1, 2, true, 4, Object, 6, 7, Object, 9, Array[1]] If we want to filter items

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_row.match(/<td[\s\S]*?<\/td>/g); row.Cells = new Array(); if (onRowBindFuncText != null) { /*Fonksyon tanımlanmaışsa daha hızlı çalış*/ var cellCount = 0; for (i = 0; i < row_cells.length; i++) { var cell = new Cell(); $.each(this, function (k, v) { if ((row_cells[i]+"").includes("#Eval(" + k + ")")) { cell.Keys.push(new Key(k,v)); ...Code goes on

How to use Visual Studio code to lint JavaScript file based on babel/ES7 stage-0 rules? I only need to lint code. I already have webpack transpiling Js file. Damien Leroux How I proceed: install globally eslint : npm install -g eslint install babel-eslint : npm install --save-dev babel-eslint install eslint-plugin-react : npm install --save-dev eslint-plugin-react create .eslintrc file in you root directory. here is my config: { "env": { "browser": true, "node": true, "es6": true, "jest": true, "jquery": true }, "parser": "babel-eslint", "parserOptions": { "ecmaVersion": 6, "sourceType":