javascript执行时间间隔的函数

Question

I have the simple function of changing content of container div. There is a <table> inside the container <div> , with 2 <td> s, the javascript simply moves left this <table> and it works, but onclick and I need to execute the moving function with time interval.

 <div onclick="move(this.children[0])" class="table_wrap">
 <div class="table_scroll" style="left: 0px;">

 <table cellpadding="0" cellspacing="5" width="1920px">
    <tr>
        <td style="background-color: red;">
            a
        </td>
        <td style="background-color: blue;">
            b
        </td>
    </tr>
 </table>

 </div>
 </div>

   <script language="javascript">
 function move(elem) {

          var left = 0

          function frame() {

            left -= 5;  // update parameters 

            elem.style.left = left + 'px' // show frame 

            if (left == -965)  // check finish condition
              clearInterval(id)
          }
          var id = setInterval(frame, 1) // draw every 10ms
        }

       </script>

And CSS:

 <style type="text/css">
 .table_wrap{
 position:relative;
 overflow:hidden;
 width: 967px;
 height: 250px;
 left: -2px;
 top: 5px;
 }
 .table_wrap .table_scroll{
 position: absolute;
 text-align:center;
 white-space:nowrap;
 }
 </style>

I tryed to use setInterval , but failed.

http://jsfiddle.net/hqztm2dt/1/ here is the JSfiddle, just click on the red line.. Thanks in advance for the attention !

Answer 1

If you need to move it on interval, see this: http://jsfiddle.net/gsddsxgy/2/ (here the time interval is 3ms)

html:

<div  class="table_wrap">
 <div id='move' class="table_scroll" style="left: 0px;">

 <table cellpadding="0" cellspacing="5" width="1920px">
    <tr>
        <td style="background-color: red;">
            a
        </td>
        <td style="background-color: blue;">
            b
        </td>
    </tr>
 </table>

 </div>
 </div>

JS:

setInterval(function(){ 

var elem=document.getElementById('move');
 var left = 0

          function frame() {

            left -= 5;  // update parameters 

            elem.style.left = left + 'px' // show frame 

            if (left == -965)  // check finish condition
              clearInterval(id)
          }
          var id = setInterval(frame, 1) // draw every 10ms






    }, 3000);

If you need to move the div on click but after a little time gap, see this http://jsfiddle.net/gsddsxgy/

code:

function move(elem) {
setTimeout(function(){ 


 var left = 0

          function frame() {

            left -= 5;  // update parameters 

            elem.style.left = left + 'px' // show frame 

            if (left == -965)  // check finish condition
              clearInterval(id)
          }
          var id = setInterval(frame, 1) // draw every 10ms



}, 1000);

        }

Answer 2

The problem with your code in jsFiddle is the move function isn't defined when trying to call it - if you use addEventListener you can bind the method to the click event using just javascript and not the onClick attribute. Using your code:

var elem = document.getElementById('wrapper');
elem.addEventListener('click', move);

function move() {

    var left = 0

    function frame() {

        left -= 5;  // update parameters 

        elem.style.left = left + 'px' // show frame 

        if (left == -965)  // check finish condition
            clearInterval(id)
        }

    var id = setInterval(frame, 1) // draw every 10ms
}

JS fiddle - http://jsfiddle.net/b1q7poj4/2/