How to wait for a function to finish in javascript? To wait for a function to finish in JavaScript, use async/await or Promises. Wrap the function call in an async function and await its completion. This ensures sequential execution. However, keep in mind that waiting too long can impact ...
// as we are in global scope, you can't use `async` ... so use Promise.then instead ...
function longRunningTask() { // do something that takes a long time } longRunningTask(); updateUI(); // this has to wait for longRunningTask to finish 在这个例子中,updateUI函数需要等待longRunningTask函数完成才能开始。这可能会导致用户界面冻结,给用户带来不好的体验。 一个更好的做法是使用Web Work...
async function myfunction() { console.log('Inside of myfunction'); } // Here we wait for the myfunction to finish // and then returns a promise that'll be waited for aswell // It's useless to wait the myfunction to finish before to return // we can simply returns a promise that...
async function loadData() { try { var data = JSON.parse(await getJSON()); console.log(data); } catch(e) { console.log(e); } } 3. 条件 用async/ wait编写条件代码要简单得多: function loadData() { return getJSON() .then(function(response) { if (response.needsAnotherRequest) { ...
How to wait for AJAX request to finish in javascript? Now I do like this to populate a dropdownlist; x_coloredcode populatelistwithAJAX(ddl); setSelectedValueInDDL(ddl); function populatelistwithAJAX(ddl) { ... var webRequest = Sys.Net.WebServiceProxy.invoke('../WebServices/...asmx'...
In this short guide, we’ll learn how to wait in JavaScript - or rather, how to sleep/delay code execution, using the setTimeout() function. The setTimeout() Function In vanilla JavaScript - we can use the built-in setTimeout() function to "sleep"/delay code execution: setTimeout(...
function getUsername(person) { return person.username; } async function chainedFetchMessages(p, username) { // In this function, p is a promise. We wait for it to finish, // then run fetchMessages(). const obj = await p; const data = await fetchMessages(username); ...
asyncfunctionchainedFetchMessages(p, username) {//In this function, p is a promise. We wait for it to finish,//then run fetchMessages().const obj =await p; const data=await fetchMessages(username);return{ ...obj, [username]: data}; ...
我在过去为这个任务写了下面的脚本。它是为源代码末尾有**/html标签的网页设计的。在许多网页上，/...