What s the equivalent of Java s Thread sleep in JavaScript

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What s the equivalent of Java s Thread sleep   in JavaScript

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This eventually helped me       var x   0      var buttonText    LOADING            startbutton   click function              this  text buttonText           window setTimeout addDotToButton 2000               function addDotToButton            x            buttonText                     startbutton   text buttonText            if  x  lt  4  window setTimeout addDotToButton  2000           else location reload true

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Assuming you re able to use ECMAScript 2017 you can emulate similar behaviour by using async await and setTimeout  Here s an example sleep function   async function sleep msec        return new Promise resolve   gt  setTimeout resolve  msec        You can then use the sleep function in any other async function like this   async function testSleep         console log  Waiting for 1 second           await sleep 1000       console log  Waiting done        Called 1 second after the first console log     This is nice because it avoids needing a callback  The down side is that it can only be used in async functions  Behind the scenes the testSleep function is paused  and after the sleep completes it is resumed   From MDN      The await expression causes async function execution to pause until  a   Promise is fulfilled or rejected  and to resume execution of the async   function after fulfillment    For a full explanation see    https   developer mozilla org en-US docs Web JavaScript Reference Statements async function https   developer mozilla org en-US docs Web JavaScript Reference Operators await

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setTimeout would not hold and resume on your own thread however Thread sleep does  There is no actual equal in Javascript

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Or maybe you can use the setInterval function  to call a particular function  after the specified number of milliseconds  Just do a google for the setInterval prototype I don t quite recollect it

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You can either write a spin loop  a loop that just loops for a long period of time performing some sort of computation to delay the function  or use   setTimeout  Func1     3000     This will call  Func1    after 3 seconds   Edit   Credit goes to the commenters  but you can pass anonymous functions to setTimeout   setTimeout function          Do some stuff here    3000     This is much more efficient and does not invoke javascript s eval function

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For Best solution  Use async await statement for ecma script 2017  await can use only inside of async function   function sleep time        return new Promise  resolve    gt            setTimeout resolve  time    1000              await sleep 10000     this method wait for 10 sec    Note   async   await not actualy stoped thread like Thread sleep but simulate it

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The simple answer is that there is no such function   The closest thing you have is   var millisecondsToWait   500  setTimeout function            Whatever you want to do after the wait    millisecondsToWait     Note that you especially don t want to busy-wait  e g  in a spin loop   since your browser is almost certainly executing your JavaScript in a single-threaded environment   Here are a couple of other SO questions that deal with threads in JavaScript    JavaScript and Threads Why doesn  39 t JavaScript support multithreading    And this question may also be helpful    setTimeout - how to avoid using string for callback

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There s no direct equivalent  as it d pause a webpage   However there is a setTimeout    e g    function doSomething       thing   thing   1    setTimeout doSomething  500       Closure example  thanks Daniel    function doSomething val      thing   thing   1    setTimeout function     doSomething val     500       The second argument is milliseconds before firing  you can use this for time events or waiting before performing an operation   Edit   Updated based on comments for a cleaner result

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Try with this code  I hope it s useful for you   function sleep seconds       var e   new Date   getTime      seconds   1000     while  new Date   getTime    lt   e

[java] What's the equivalent of Java's Thread.sleep() in JavaScript?

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