I enabled ECMAScript 6 on WebStorm so that I do not get IDE errors when using arrow functions.
However, I did not install Babel. I was prompted to install Babel after enabling ECMAScript 6. I had problems installing Babel.
Is it necessary to use Babel together with ECMAScript 6? What would be the side effect of enabling ECMAScript 6 without installing Babel?
I am using node.js on WebStorm.
The purposes of Babel is to convert es6 code into es5 code BECAUSE most browsers do not FULLY support es6 yet, although are getting closer.
https://kangax.github.io/compat-table/es6/
You will see that IE11 support is poor whilst Firefox and Chrome almost have full support.
However, given that the latest Node fully understands ES6 there is now no need for Babel when using Node only unless of course you need to support older versions of Node which only understand ES5.
PS: if you enable Babel support in Webstorm it can generate ES5 files on the fly for you as you code in ES6. Alternatively, you can use a task runner such as Grunt or Gulp to do this for you. Depends if you need it!
Related
According to the official guide, I could remove babel from our project if I'm getting compiling done with TypeScript.
Will my page support the same browsers as before, or do I need to replace this preset with something?
For typescript to be compiled to handle modern browsers, removing babel-preset-ENV will ensure that browser support will be maintained.
If you don’t need ECMAScript 5 syntax, remove the Babel preset.
Modern browsers will be able to execute whatever Typescript has compiled.
Is there any way to run ES6 in Node REPL (Read Evaluate Print Loop)? While running ES 6 commands, I am getting error as shown in the screenshot. Appreciate if someone can help me to configure Node to run ES6 code.
TL;DR: Upgrade Node
I have Node.js v6.0.0, which means I have all the ES6 features unlocked by default. My REPL has support for (basically) everything. Now, node v6.0.0 is currently in development, so you might not want to upgrade your production server, but if you're a developer, it's really stable enough for everyday use.
If you must use an outdated version of node, I would suggest you install n. It's a way to manage your versions of node on one machine.
Good Luck!
Node 4 and higher supports most ES6 features out of the box, here is compatibility table.
To use ES6 features in older Node versions, it should be started with --harmony flag, and code should run in strict mode.
It is not possible to enable strict mode with 'use strict' for REPL globally, so ES6 code should be placed inside IIFE.
Strict mode can be enabled globally with --use_strict. To enable experimental ES6 support in REPL in older Node versions (0.12.x and lower) it should be started with
node --harmony --use_strict
Add 'use strict'.
Strict Mode is a new feature in ECMAScript 5 that allows you to place a program, or a function, in a "strict" operating context. This strict context prevents certain actions from being taken and throws more exceptions.
more information about use strict is here or here
My one website is into requirement gathering stage. I know that JavaScript new version ES6 is introduced.
On googling, I found some good tools to work with ES6 like:-
Bable
Traceur
Is there any Nuget package available or any alternate that will convert ES6 to ES5 parallely.
or How do I get started with ES6 in ASP.Net MVC site.
I am using VS 2015 & ASP.Net(4.5.2)
You can try Webpack with visual Studio here is a useful package. Just dont forget you require the Babel module.
I'm running Eclipse Mars 4.5 with JSDT and it's getting increasingly difficult to use this for JavaScript/Node.JS development, since it doen't recognize modern patterns:
This is because the JavaScript Validator is set to ECMAScript 3.
To my surprise for such an up-to-date release of Eclipse, this dropdown is greyed out and I cannot select 5 or 5.1, let alone 6. ES3 is from 1999 (!).
Am I correct to assume that Eclipse has no considerable JavaScript community? Other FOSS projects with modern ECMAScript support:
NetBeans supports ES5.1, ES6 in 8.1
Atom.io supports ES6
(I haven't used these so I don't know how they compare to Eclipse)
Is Eclipse discouraged for JavaScript development? Or is there actually a well-documented non-hacky go-to plugin for Eclipse to play nice with ES6?
Eclipse Neon will improve a lot support for JavaScript with JST 2.0.0 like :
support for ES6
Grunt, Gulp, npm support
You can try too tern.java if you wish advanced completion, validation where you can use for eslint, jshint which support ES6. See Tern Linter section for that.
Ive seen other questions regarding this issue - Is there a way to turn on ES6/ES7 syntax support in vscode? - but this has now been addressed by Microsoft and implemented in VSCode.
However, I have downloaded the latest version of VSCode, and cloned the example es6 repo from GitHub, and it seems to not be working
To turn ES6/ES7 support, the best way is to use ESLint with dedicated parser ( babel, etc...). I try it if you're interested: VSCode Linter ES6 ES7 Babel linter.
If you're using eslint with npm, you may need the .eslintrc file in the root folder of your project. See my answer to this question and the docs for the ESLint VSCode extension.