按钮onclick功能触发两次 [英] button onclick function firing twice

问题描述

我有一个使用事件处理程序调用javascript函数的按钮.由于某种原因，事件处理程序被调用了两次.

I have a button that calls a javascript function using an event handler. For some reason, the event handler is being called twice.

这是我的按钮(我正在使用php对象生成代码，这就是为什么有很多空标签的原因):

Here is my button (I am using a php object to generate the code, that's why there are a lot of empty tags):

<button name="addToCart" value="" size="" onclick="" src="" class="addToCartButton" id="0011110421111" type="button" formtarget="_self" formmethod="post" formaction="" data-mini="true" width="" height="" placeholder="" data-mini="1" onkeypress="" >Add To Cart</button>

这是我的事件处理程序:

Here is my event handler:

$('.addToCartButton').click(function() {
    alert("bob");
    //addToCart($(this).attr("id"));
});

在这里，我两次收到警报.

Here, I am getting the alert twice.

我尝试在按钮的onclick属性中调用函数addToCart，但是如果我这样尝试，则会出现此错误:

I have tried calling the function addToCart in the button's onclick property, but if I try it that way, I get this error:

TypeError: '[object HTMLButtonElement]' is not a function (evaluating 'addToCart(0011110421111)')

我也尝试过event.preventDefault()和event.stopPropagation()，但都没有用.

I have also tried event.preventDefault() and event.stopPropagation(), and neither worked.

有什么想法为什么会发生这种情况，或者我可以做些什么来阻止它执行两次，或者如果我从onclick ="调用javascript函数时为什么会出错呢?

Any ideas why this is happening, or what I can do to stop it from executing twice, or maybe why I am getting an error if I call the javascript function from onclick=""?

推荐答案

也许您在同一按钮上两次附加了该事件.您可以做的是取消绑定任何先前设置的单击事件，如下所示:

Maybe you are attaching the event twice on the same button. What you could do is unbind any previously set click events like this:

$('.addToCartButton').unbind('click').click(function() {
    alert("bob");
    //addToCart($(this).attr("id"));
});

这适用于所有附加事件(鼠标悬停，鼠标悬停，单击...)

This works for all attached events (mouseover, mouseout, click, ...)

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