Recently, I also need to use TypeScript in my daily work in the new environment. I encountered some doubts during the learning process and recorded it. Personally, I think it is more suitable forTypeScript entrystudents to read, because of the doubts I encountered, you may also encounter th...
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...
In the other cases, we’ll have errors.A general rule of thumb is to always define functions, variables, objects and classes before using them, to avoid surprises.Suppose we have a function:function bark() { alert('wof!') }Due to hoisting, we can technically invoke bark() before it ...
what-is-that Minimal, tiny (1.1 kb) object type identifier for both Node.js and browser written in TypeScript. Feature Minimal: simply detect the type for any objects. Fast: it's basically an if statement. Tiny: only 1.1kb of gzipped....
For the sample above, the TypeScript compiler emits the below ES6 JavaScript for the ping function.function ping() { return __awaiter(this, void 0, Promise, function* () { for (var i = 0; i < 10; i++) { yield delay(300); console.log(“ping”); } }); }...
request-promise, helmet, shelljs, react-modal, node-forge, passport, asap, assert, bootstrap, color-convert, jwt-decode, isomorphic-fetch, argparse, got, joi, hammerjs, shallowequal, recompose, jsdom, atob, sinon-chai, @testing-library/jest-dom, ua-parser-js, react-virtualized, redux-logge...
exportasyncfunctionsayHello():Promise<void>{ console.log('Saying hello to',greetedPubkey.toBase58()) constinstruction=newTransactionInstruction({ keys:[{pubkey:greetedPubkey,isSigner:false,isWritable:true}], programId, data:Buffer.alloc(0),// All instructions are hellos ...
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...
What a package manager solves, then, is more a matter of scaling and handling concerns. Simply linking to a package in a script tag works well, as long as: the number of projects you have is manageable; the number of people working on the projects is manageable; ...