https://stackoverflow.com › questions › 38235715
Fetch: reject promise and catch the error if status is not OK?You could also reject the Promise from your status function as so: function status(res) { if (!res.ok) { return Promise.reject(res.statusText); } return res; } Or actually you could reject the promise with the message given by your endpoint.
https://stackoverflow.com › questions › 29473426
fetch: Reject promise with JSON error object - Stack Overflownew Promise((resolve, reject) => { fetch(url) .then(async (response) => { const data = await response.json(); return { statusCode: response.status, body: data }; }) .then((response) => { if (response.statusCode >= 200 && response.statusCode < 300) { resolve(response.body); } else { reject(response.body); } }) });
https://developer.mozilla.org › en-US › docs › Web › API › Fetch_API › Using_Fetch
Using the Fetch API - Web APIs | MDN - MDN Web DocsThe fetch() function returns a Promise which is fulfilled with a Response object representing the server's response. You can then check the request status and extract the body of the response in various formats, including text and JSON, by calling the appropriate method on the response.
https://medium.com › ... › how-to-make-http-requests-using-fetch-api-and-promises-b0ca7370a444
How to make HTTP requests using Fetch API and PromisesYou will learn how to make a HTTP request using Fetch API, learn the basics of a native JavaScript Promise object and how to chain Promises using the Promise.prototype.then() method.
https://plainenglish.io › blog › handling-unsuccessful-calls-of-fetch-api-7eef551b74c8
How to Handle Unsuccessful Fetch API Calls in JavaScript - Plain EnglishAs you can see, the state of promise is rejected and hence a catch block can handle this error. You can print the response instead of returning it, but you'll get the same results. catch() block can handle syntax errors because if the syntax is wrong : fetch cannot succeed → so promise not returned→ so error goes to catch
https://javascript.info › promise-error-handling
Error handling with promises - The Modern JavaScript TutorialIf we throw inside a .then handler, that means a rejected promise, so the control jumps to the nearest error handler. Here’s an example: new Promise((resolve, reject) => { resolve("ok"); }).then((result) => { throw new Error("Whoops!"); // rejects the promise }).catch(alert); // Error: Whoops!
https://developer.mozilla.org › fr › docs › Learn › JavaScript › Asynchronous › Promises
Comment utiliser les promesses - Apprendre le développement web - MDNAvec une API fonctionnant avec des promesses, la fonction asynchrone démarre l'opération et renvoie un objet Promise. On peut alors attacher des gestionnaires à cette promesse et les gestionnaires seront exécutés lors du succès ou de l'échec de l'opération. Utiliser l'API fetch()
https://dev.to › thecharacterv › error-handling-in-the-javascript-fetch-api-1f7a
Error handling in the JavaScript Fetch API - DEV CommunityThe fetch API returns a promise which either resolves or rejects. If it resolves, it will go into "then", and if it rejects, it will go into "catch". When a status code other than 200 is received, that does not mean that fetch had a bad response. An example of this could be if the database failed to connect. The backend could be ...
https://flaviocopes.com › javascript-promises-rejection
How to handle promise rejections - flaviocopes.comHere’s an example using the Fetch API: fetch ('/data.json'). then (response => { console. log (response.status)}) What if there is an error during the fetch() call? Perhaps the network is unavailable. Or the network request returns an error. The promise will reject. A promise will look something like this: const thePromise = new ...
https://medium.com › @firatatalay › promises-and-the-fetch-api-3072859932d9
Promises and the Fetch API - MediumOn the other hand, a rejected promise means that there has been an error during the asynchronous task. And the example of fetching data from an API, an error would be for example, when the user...
