How to use JavaScript function waiting Await syntax
This article mainly introduces the relevant knowledge of "JavaScript function waiting for Await syntax how to use". Xiaobian shows you the operation process through actual cases. The operation method is simple, fast and practical. I hope this article "JavaScript function waiting for Await syntax how to use" can help you solve the problem.
JavaScript functions wait for Await syntax
The keyword await before the function causes the function to wait for promise:
let value = await promise;
The await keyword can only be used in async functions.
examples
Let's take it slow and learn how to use it.
basic grammar
async function myDisplay（） {
let myPromise = new Promise（function（myResolve, myReject） {
myResolve（"I love You !! "）;
}）;
document.getElementById（"demo"）。innerHTML = await myPromise;
}
myDisplay（）;
wait timeout
async function myDisplay（） {
let myPromise = new Promise（function（myResolve, myReject） {
setTimeout（function（） { myResolve（"I love You !! "）; }, 3000）;
}）;
document.getElementById（"demo"）。innerHTML = await myPromise;
}
myDisplay（）;
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