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In the previous article Native ECMAScript modules: the new features and differences from Webpack modules we understood the differences between ES modules and their implementation in bundlers/compilers like Webpack/Babel. So far we found couple gotchas and know how to use the import \ export declarations and which caveats we may have using them in JS. But JavaScript went asynchronous many years ago
A few months ago I wrote an article describing the various differences that exist between Node.js CommonJS modules and the new ES6 Module system; and described a number of challenges inherent with implementing the new model in Node.js core. Here, I want to provide an update on how things are progressing. Knowing when you know what you need to knowIf you haven’t done so already, before progressing
In the previous article Native ECMAScript modules - the first overview I described the history of the JavaScript modules and the current situation with the native ECMAScript modules implementation: For now, we have 2 available implementations, which we tried and compared to the bundled module. The main takeaways, so far, are: To execute a script or load an external file and execute it as a module
A proposed “spec mode” for Babel makes transpiled ES modules more spec-compliant. That’s a crucial step in preparing for native ES modules. You’ll also learn how ES modules and CommonJS modules will interoperate on Node.js and how far along ES module support is on browsers and Node.js. Update 2017-05-08: follow-up blog post: Module specifiers: differences between CJS and ESM Transpiling ES modules
All the major browsers shipped the native JavaScript modules support out of the box: which means, the time we can use them without module bundlers/transpilers has come. To understand better how we come to this point let’s start from the JS modules history and then take a look at the current Native ES modules features. ...
Node.js dropped support for 0.12, so we do. Breaking changes: Using CommonJS or AMD export stuff in a ES2015 module will emit errors. Usablility: performance hints are off by default. It was too annoying, but you can still see the [big] flag by default. Bugfixes: webpack now exits with non-zero exit code when configuration Promise is rejected. Features: ProvidePlugin supports passing array to acce
Warning: This blog post is outdated. Instead, read section “Loading modules dynamically via import()” in “JavaScript for impatient programmers”. The ECMAScript proposal “import()” by Domenic Denicola is at stage 4 and part of ECMAScript 2020. It enables dynamic loading of ECMAScript modules and is explained in this blog post. ECMAScript modules are static # ECMAScript modules are completely stati
We had a discussion in TC39 this week about how to think about the JS module system's default export feature. It turns out one of the ways people explain this feature is as a shorthand for an export with the name default. For example: import LoadingSpinner from 'loading-spinner'; is equivalent to: import { default as LoadingSpinner } from 'loading-spinner'; This is technically accurate information
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