TIL Promise Constructor edge-case
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TAGS: javascript async
// Creating a promise with the promise constructor
// this will also catch the error
const createdPromise = new Promise((resolve, reject) => {
somePreviousPromise.then(result => {
// do something with the result
resolve(result);
}).catch(reject);
});
// This is the same function, only cleaner
const createdPromise = somePreviousPromise.then(result => {
// do something with result
return result;
});The promise constructor has to do a few more workarounds in order to catch errors.
Via 3 most common mistakes when using Promises in JavaScript
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Tagged: javascript