Question

我正在使用jQuery来侦听DOMSubtreeModified事件，然后执行一个函数。我需要的是每个事件爆发只运行一次函数的方法。因此，在这种情况下，事件将仅在1秒后运行，并在3秒后再次运行。做这个的最好方式是什么？

的jQuery

$(function(){

    setTimeout(function(){
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
    },1000);

    setTimeout(function(){
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
    },3000);

    $('#container').bind('DOMSubtreeModified',function(){
        console.log('event');
        functionToRun();
    });

});

HTML

<div id="container"></div>

更新
setTimeout函数只是为了模拟我的问题。我需要一个解决方案，而无需更改setTimeout代码。我遇到的问题是我得到了一些DOMSubtreeModified事件，我每次爆发只需要一个。

Answer 1

替代方法，它将控制任何函数的速率。

// Control the call rate of a function.
//  Note that this version makes no attempt to handle parameters
//  It always induces a delay, which makes the state tracking much easier.
//    This makes it only useful for small time periods, however.
//    Just clearing a flag after the timeout won't work, because we want
//    to do the the routine at least once if was called during the wait period.
throttle = function(call, timeout) {
  var my = function() {
    if (!my.handle) {
      my.handle = setTimeout(my.rightNow, timeout);
    }
  };
  my.rightNow = function() {
    if (my.handle) {
      clearTimeout(my.handle);
      my.handle = null;
    }
    call();
  };
  return my;
};

Answer 2

自己解决了。

$(function(){

    setTimeout(function(){
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
    },1000);

    setTimeout(function(){
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
    },1100);

    setTimeout(function(){
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
        $('#container')[0].innerHTML = 'test';
    },3000);

    addDivListener();

 });

 function addDivListener() {
    $('#container').bind('DOMSubtreeModified',function(){
        functionToRun();
        $(this).unbind('DOMSubtreeModified');
        setTimeout(addDivListener,10);  
    });
 }

 function functionToRun(){
    console.log('event');
 }

这在Firebug控制台中打印出事件 3次，精确到100毫秒。

Answer 3

这似乎就是你要找的东西：

$(
  function()
  {
    setTimeout 
    (
      StartWatching,
      1000
    );
  }
);

function StartWatching()
{
  $('#container')
     .bind(
            'DOMSubtreeModified',
            function()
            {
              console.log('event');
              StopWatchingAndStartAgainLater();
            }
          );
}

function StopWatching()
{
  $('#container')
      .unbind('DOMSubtreeModified');
}

function StopWatchingAndStartAgainLater()
{
  StopWatching();
  setTimeout
  (
    StartWatching,
    3000
  );
}

这会强制执行以下流程：

Document.Ready
Create DOM watching event after one second
On event, turn off event and recreate it after three seconds, rinse, repeat

Answer 4

尝试使用one()处理程序

documentation

使用jQuery为每个事件突发运行一次函数

4 个答案: