https://stackoverflow.com › questions › 33445415
JavaScript Promises - reject vs. throw - Stack OverflowAny time you are inside of a promise callback, you can use throw. However, if you're in any other asynchronous callback, you must use reject. For example, this won't trigger the catch: new Promise(function() {. setTimeout(function() {. throw 'or nah'; // return Promise.reject('or nah'); also won't work. }, 1000);
https://javascript.info › promise-error-handling
Error handling with promises - The Modern JavaScript TutorialLearn how to use .catch to handle errors in promise chains, and how to rethrow or stop the execution. Also, see how to deal with unhandled rejections and the implicit try..catch around promises.
https://www.javascripttutorial.net › promise-error-handling
Promise Error Handling - JavaScript TutorialLearn how to deal with error handling in promises using then(), catch(), try/catch, and reject(). See examples of errors inside and outside the promises, and how to handle them with different methods.
https://stackoverflow.com › questions › 36652195
javascript - Using throw in promises - Stack OverflowI would like to create a function that returns a promise and if something throws an error within, it returns promise reject.
https://fr.javascript.info › promise-error-handling
Gestion des erreurs avec des promesses - JavaScriptnew Promise((resolve, reject) => { resolve("ok"); }).then((result) => { throw new Error("Whoops!"); // rejette la promesse }).catch(alert); // Error: Whoops! Cela se produit pour toutes les erreurs, pas seulement celles causées par l’état throw .
https://stackoverflow.com › questions › 42167274
javascript - Rethrowing error in promise catch - Stack OverflowSome of the useful reasons for catching and rethrowing are as follows: You want to log the error, but keep the promise chain as rejected. You want to turn the error into some other error (often for easier error processing at the end of the chain). In this case, you would rethrow a different error.
https://dev.to › gitfudge › javascript-error-handling-with-promises-and-async-await-in-es6...
JavaScript: Error handling with Promises and Async/AwaitError handling in JavaScript can be easy while being tricky at certain places, especially Promises. JS allows error handling with the help of try, catch, and throw.
https://developer.mozilla.org › fr › docs › Web › JavaScript › Guide › Using_promises
Utiliser les promesses - JavaScript | MDN - MDN Web DocsPromise.resolve() et Promise.reject() sont des méthodes qui permettent de créer des promesses déjà tenues ou rompues. Promise.all() et Promise.race() sont deux outils de composition qui permettent de mener des opérations asynchrones en parallèle.
The then() method takes up to two arguments; the first argument is a callback function for the fulfilled case of the promise, and the second argument is a callback function for the rejected case. The catch() and finally() methods call then() internally and make error handling less verbose.
js. Promise.try(func) Parameters. func. A function that is called synchronously with no arguments. It can do anything—either return a value, throw an error, or return a promise. Return value. A Promise that is: Already fulfilled, if func synchronously returns a value. Already rejected, if func synchronously throws an error.
