es6-modules

The ES6 module that I want to test looks as follows: function privateFunction() { ... } export function publicFunction() { ... does something ... privateFunction() ... does something else ... } I am using JEST for my unit tests and I am trying to find a way to test publicFunction and avoiding the execution of privateFunction by mocking it but I couldn't succeed in the mock attempt. Any idea? I found out a way to mock my private function by using the babel-plugin-rewire module. In package.json I have the following: "devDependencies": { ... "babel-plugin-rewire": "1.0.0-beta-5", "babel-jest":

I am using ES6 modules by adding the --experimental-modules arguments to Node. Running node --experimental-modules app.mjs works perfectly fine. However, when I run the same command with pm2 I get the following error: Error [ERR_REQUIRE_ESM]: Must use import to load ES Module My current pm2 config file looks like this: "apps": [ { "name": "api", "script": "app.mjs", "exec_mode": "cluster", "instances": "max", "node_args": "--experimental-modules", "env": { variables here.. } } ], I have also tried using esm instead like this: "node_args": "-r esm" In both cases they return the same [ERR

I have a set of spec v1 custom elements which I'm using webpack 4 to bundle (and babel-loader to transpile). The components all look similar to this: export class CompDiv extends HTMLDivElement { constructor(...args) { const self = super(...args); self.property = null; return self; } connectedCallback() { console.log('connected CompDiv'); } } customElements.define('comp-div', CompDiv, { extends: 'div' }); Now to be able to create custom packages from these components using selective, named imports I need to mark these files as side-effect-free . The component registration, though, takes place

I'm adding typescript support to a react codebase, and while the app is working ok, jest tests are failing all over the place, apparently not recognizing something about es6 syntax. We're using ts-jest for this. Below is the error message I'm getting, right off the bat when trying to process jest's tests setup file. FAIL src/data/reducers/reducers.test.js ● Test suite failed to run /Users/ernesto/code/app/react/setupTests.js:1 ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import './polyfills'; ^^^^^^^^^^^^^ SyntaxError: Unexpected string at

ES6 modules allows us to create a single point of entry like so: // main.js import foo from 'foo'; foo() <script src="scripts/main.js" type="module"></script> foo.js will be stored in the browser cache. This is desirable until I push a new version of foo.js to production. It is common practice to add a query string param with a unique id to force the browser to fetch a new version of a js file ( foo.js?cb=1234 ) How can this be achieved using the es6 module pattern? From my point of view dynamic imports could be a solution here. Step 1) Create a manifest file with gulp or webpack. There you