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How to stop the execution of a function using JavaScript?

王林
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2023-09-15 12:37:021278browse

How to stop the execution of a function using JavaScript?

To stop the execution of a function in JavaScript, use the clearTimeout() method. This function call clears any timers set by the setTimeout() function.

Example

You can try running the following code to learn how to use the clearTimeout() method in JavaScript.

<html>
   <head>
      <title>JavaScript clearTimeout() method</title>
      <script>
         <!--
            var imgObj = null;
            var animate ;
           
            function init(){
               imgObj = document.getElementById(&#39;myImage&#39;);
               imgObj.style.position= &#39;relative&#39;;
               imgObj.style.left = &#39;0px&#39;;
            }
            function moveRight(){
               imgObj.style.left = parseInt(imgObj.style.left) + 10 + &#39;px&#39;;
               animate = setTimeout(moveRight,20);    // call moveRight in 20msec
            }
            function stop(){
               clearTimeout(animate);
               imgObj.style.left = &#39;0px&#39;;
            }
            window.onload = init;
         //-->
      </script>
   </head>
   <body>
      <form>
         <img  id = "myImage" src = "/images/html.gif" / alt="How to stop the execution of a function using JavaScript?" >
         <p>Click the buttons below to handle animation</p>
         <input type = "button" value = "Start" onclick = "moveRight();" />
         <input type = "button" value = "Stop" onclick = "stop();" />
      </form>
   </body>
</html>

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