babel-sublime VS ECMAScript 6 compatibility table

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Some of the most popular JavaScript linting tools are ESLint, JSHint, JSLint and JSCS. We're going to be using ESLint. It’s very flexible, easy to use and has the best ES6 support, which will be helpful if we introduce more modern JavaScript (that will be transpiled for older browsers using https://babeljs.io/). All rules for ESLint can be found here: https://eslint.org/docs/rules/.

This simply extends the existing build process that many front-end frameworks have. After Babel's done with its transpilation, it merely executes code to compile your initial screen into static HTML and CSS. This isn't entirely dissimilar from how SSR hydrates your initial screen, but it's done at compile-time, not at request time.

First, we switched the default compiler for new projects from Babel to SWC (Speedy Web Compiler). SWC is dramatically faster than Babel and requires zero configuration. We’ll continue to support Babel in any project currently using it.

Nuxt.js is an open-source JavaScript framework built on Vue.js, Node.js, Vite, and Babel.js used for creating fast, cutting-edge applications. Nuxt.js possesses similar features to Next.js, with the major difference being the web framework it is compatible with. Next.js is a React framework whereas Nuxt.js is a Vue framework.

Disclaimer: If you've already developed Babel or ESLint plugins, this article may not be as beneficial for you, as you're likely already familiar with the majority of the content covered here.

Preprocessors: SSGs leverage preprocessors to streamline the development process. Preprocessors like SASS for CSS or Babel for JavaScript offer additional features and simplify code development.

To transpile our code, we will use Babel - a JavaScript compiler, that will generate files Node.js is happy with, and Webpack - a JavaScript bundler, that will bundle our code and automate the compilation step.

Can be used with promises, Node-style callbacks, ES6 generators and async/await (using Babel).

Growth in Tooling: Tools like Babel allowed developers to use the latest JavaScript features without waiting for Node.js support, while Webpack streamlined bundling and module loading.

http://kangax.github.io/compat-table/es6/

This page lists features from es6 (and newer versions linked at the top) along with compliance to the spec. First column is the current browser, second is babel+corejs polyfills.

Overall, babel gets about 70% of the way there.

Case in point: Tail Call Optimization has been part of the JS spec since ES6, but remains completely unimplemented in all mainstream browsers/engines besides Safari[1]. For all but the most predictable inputs, you're pretty much forced to use loops where recursion would otherwise be preferable.

Additional case in point: async Iterables cannot be processed as a piped stream. You must use the for await construct, which is a shame considering the FP niceties that the Array type already provides for more traditional lists. Once again, you are forced to use an imperative construct unless you specifically want to defeat the purpose of using an Iterable in the first place by trying to convert it into an Array (... and potentially choking in the process, I might add!).

[1]: https://kangax.github.io/compat-table/es6/

Eventually the browsers started racing to near-full ES6 compatibility. I remember following ES6 progress in realtime with articles and with compatibility tables http://kangax.github.io/compat-table/es6/ . But many people are acting like that either didn't happen, or like it was a one and done thing (despite the ESNext naming shift to avoid the focus on numbers). So we see people just hand-waving away the importance of polyfills like in this gem:

> https://kangax.github.io/compat-table/es6/

Oh man this was a rough one both for FF and Chrome but Chrome did perform better slightly on cursory glance.

Thanks for providing these links, they're definitely a good rule of thumb benchmarks to test new browsers

Javascript / CSS language syntax: can see availability for Javascript here - https://kangax.github.io/compat-table/es6/

I say this as a JS user, but there is no singular JavaScript (realistically, it's not even JavaScript but instead ECMAScript). There is no one place to go that lays out all of what the language can or can't do the way PHP and Python do. The ECMAScript board makes recommendations, then the browsers and runtimes implement features of the recommendations. This site does a good job laying out which features are implemented for browsers and runtimes based on the flavor of the ECMAScript standard. This unique experience can be especially frustrating for someone learning JavaScript and coming from another language that does not have this problem.

https://kangax.github.io/compat-table/es6/ has a column for "current browser"