所选类的jQuery绑定事件 [英] Jquery binding event on selected class

问题描述

这是jQuery中实现一个事件，以一组具有一定的阶级控制的绑定？在我看来，它不能。我google了一下，说想出都是无关的事件。这里是我的code的样子 -

  $（'。numonly'）。绑定（键preSS'，函数（事件）{
    如果（event.which＆GT 31安培;及（event.which＆下; 48 || event.which＆GT; 57））返回false;
}）;
 

解决方案

您code应该工作，这里是它在行动的例子： http://jsfiddle.net/g3GsE/

请确保您的code被包裹这样的，因此它不会执行，直到的document.ready ：

  $（函数（）{
  $（'。numonly'）。绑定（键preSS'，函数（事件）{
    如果（event.which＆GT 31安培;及（event.which＆下; 48 || event.which＆GT; 57））返回false;
  }）;
}）;
 

如果没有这个，它会立即执行与类=numonly元素不会在那里找到尚未...的code需要等待直到的document.ready所以它触发后的元素都在那里，所以选择找到它们。

Is it achievable in jquery to bind an event to a group of control that has certain class? It seems to me, it can't. I google a bit and all that came up are nothing to do with events. Here's how my code looks -

$('.numonly').bind('keypress',function(event){
    if (event.which > 31 && (event.which < 48 || event.which > 57)) return false;
});

解决方案

Your code should work, here's an example of it in action: http://jsfiddle.net/g3GsE/

Make sure that your code is wrapped like this so it doesn't execute until document.ready:

$(function() {
  $('.numonly').bind('keypress',function(event){
    if (event.which > 31 && (event.which < 48 || event.which > 57)) return false;
  });
});

Without this, it would execute immediately and the class="numonly" elements won't be there to find yet...the code needs to wait until document.ready so it fires after the elements are there, so the selector finds them.

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