This is a concept in the interface of ts. The interface of ts is "duck typing" or "structural subtyping", and type checking mainly focuses on the shape that values have. So let's get acquainted with the interface first, and then elicit the explanation of ?. TypeScript defines functions ...
functionsum(a:number,b:number){returna+b;}// 👇️ type T = numbertypeT=ReturnType<typeofsum>; This approach is needed because the return type of thesetTimeoutmethod isNodeJS.Timeoutin Node andnumberin the browser. By using theReturnTypeutility type, we are able to get the correct...
Promise(resolve => setTimeout(resolve, ms));} main();TypeScript uses ES6 generators to implement the ability to re-enter a function at a given point when an asynchronous call returns. Generators use the yield keyword to tell the JavaScript runtime when control is being given up while a ...
semver, debug, ws, react-syntax-highlighter, mocha, bluebird, react-redux, react-router-dom, @testing-library/dom, json5, node-fetch, jasminewd2, cheerio, is-function, react-textarea-autosize, cors, duplexify, @testing-library/react, mkdirp, babel-types, babylon, enzyme, react-native, asy...
As many of you know, Dojo 2 is being built on TypeScript. Many of us involved in Dojo 2 believe that TypeScript brings several advantages to developing with web technologies these days. Features like structural typing and interfaces help us write code th
what-is-that Minimal, tiny (1.1 kb) object type identifier for both Node.js and browser written in TypeScript.FeatureMinimal: simply detect the type for any objects. Fast: it's basically an if statement. Tiny: only 1.1kb of gzipped....
What does "object destructuring" mean and what is the result of a destructuring operation?Say you have an object with some properties:const person = { firstName: 'Tom', lastName: 'Cruise', actor: true, age: 57 }You can extract just some of the object properties and put them into ...
Breaking Changes in v5.0 Version 5.0 of the Node.js driver is not compatible with Node.js v12 or earlier. If you want to use this version of the driver, You must use Node.js v14.20.1 or greater. This release removes support for callbacks in favor of a promise-based API. The followi...
“Promise.withResolvers gives you a way to create a promise and it gives you direct access to those resolution functions.” Other functions in your code might depend on whether a promise is resolved or rejected, or you might want to pass the function to something else that can resolve the...
export async function sayHello(): Promise<void> { console.log('Saying hello to', greetedPubkey.toBase58()) const instruction = new TransactionInstruction({ keys: [{ pubkey: greetedPubkey, isSigner: false, isWritable: true }], programId, data: Buffer.alloc(0), // All instructions are ...