mirror of https://github.com/xfarrow/blink.git
40 lines
1.4 KiB
JavaScript
40 lines
1.4 KiB
JavaScript
// https://javascript.info/async-await
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// A async function always returns a promise. Other values are wrapped in a resolved promise automatically.
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// Async e Await sono solo "sintassi zuccherina" per rendere l'utilizzo delle Promise più semplice
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async function f1() {
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return 1;
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}
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f1().then(console.log); // 1
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// The keyword await makes JavaScript wait until that promise settles and returns its result.
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// It can be used in async functions only
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// Let’s emphasize: await literally suspends the function execution until the promise settles,
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// and then resumes it with the promise result.
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async function f2() {
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let promise = new Promise((resolve, reject) => {
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setTimeout(() => resolve("done!"), 1000)
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});
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let result = await promise; // wait until the promise resolves (*)
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console.log(result); // "done!"
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}
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f2();
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// Domande
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//
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// Why await only works in async function in javascript?
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// https://stackoverflow.com/questions/49640647/why-await-only-works-in-async-function-in-javascript
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//
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// Why using async-await
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// https://stackoverflow.com/questions/42624647/why-use-async-when-i-have-to-use-await
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//
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// Si faccia presente che non è possibile creare da zero una funzione asincrona (come
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// setInterval o fetch)
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// https://stackoverflow.com/questions/61857274/how-to-create-custom-asynchronous-function-in-javascript
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