Here’s a few things you could do: Export a const from the module. Depending on your use case, you could just: export const constant1 = 33; And import that from the module where necessary. Or, building on your static method idea, you could declare a static get accessor: const constant1 = 33, constant2 = 2; … Read more
If you are targeting browser environments, you need to use react-router-dom package, instead of react-router. They are following the same approach as React did, in order to separate the core, (react) and the platform specific code, (react-dom, react-native ) with the subtle difference that you don’t need to install two separate packages, so the environment … Read more
React 16.8 +, Functional component const ScrollDemo = () => { const myRef = useRef(null) const executeScroll = () => myRef.current.scrollIntoView() // run this function from an event handler or an effect to execute scroll return ( <> <div ref={myRef}>Element to scroll to</div> <button onClick={executeScroll}> Click to scroll </button> </> ) } Click here for … Read more
Default Export (export default) // MyClass.ts — using default export export default class MyClass { /* … */ } The main difference is that you can only have one default export per file and you import it like so: import MyClass from “./MyClass”; You can give it any name you like. For example this works … Read more
This is done with Webpack resolve.alias configuration option and isn’t specific to Vue. In Vue Webpack template, Webpack is configured to replace @/ with src path: const path = require(‘path’); … resolve: { extensions: [‘.js’, ‘.vue’, ‘.json’], alias: { … ‘@’: path.resolve(‘src’), } }, … The alias is used as: import ‘@/<path inside src folder>’;
The original motivation for introducing symbols to Javascript was to enable private properties. Unfortunately, they ended up being severely downgraded. They are no longer private, since you can find them via reflection, for example, using Object.getOwnPropertySymbols or proxies. They are now known as unique symbols and their only intended use is to avoid name clashes … Read more
Edit: Several years have passed and this isn’t really the right way to do this any more (and probably never was, my bad). Mutating an imported module is nasty and can lead to side effects like tests that pass or fail depending on execution order. I’m leaving this answer in its original form for historical … Read more
Updated for 2022 You are using EcmaScript Module (ESM or ‘ES6 Modules’) syntax but your environment does not support it. NodeJS versions prior to v14.13.0 do not support ESM (export keyword syntax) and use CommonJS Modules (module.exports property syntax). NodeJS v14.13.0 and newer supports ESM but it must be enabled first. Solutions: If you are … Read more
Map.keys() returns a MapIterator object which can be converted to Array using Array.from: let keys = Array.from( myMap.keys() ); // [“a”, “b”] EDIT: you can also convert iterable object to array using spread syntax let keys =[ …myMap.keys() ]; // [“a”, “b”]
Edit: Things change fast and this is outdated – see update Do you want to fetch and execute the script again and again, every time this component is rendered, or just once when this component is mounted into the DOM? Perhaps try something like this: componentDidMount () { const script = document.createElement(“script”); script.src = “https://use.typekit.net/foobar.js”; … Read more