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How can I use Promises in JavaScript?

I can't understand what are the Promises in JavaScript and how can I use them. Please, someone try to teach me in a way that os easy to understand. If you note some grammar error, sorry, I'm learning English too.

19th Jul 2019, 11:50 PM
Knexx
Knexx - avatar
1 ответ
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For creating a function that returns promise use async and await e.g.:- async function a(){return await new Promise((r,e)=>{ //You can now perform a simple Ajax call here //r() function will be called when the promise is resolved and e() will be called when error occurred });} async means asynchronous i.e real-time and await will wait for the result until a particular operation is done so if you Ajax call then the promise will only return if the Ajax call is fulfilled.
20th Jul 2019, 7:18 AM
Pratyush Tiwary
Pratyush Tiwary - avatar