什么是JavaScript中的“click()” [英] What is 'click()' in JavaScript
问题描述
我在FireFox中使用JavaScript,遇到了以下示例中说明的问题:
I was playing around with JavaScript in FireFox, and hit a problem that is illustrated in the following example:
<HEAD>
<script type="text/javascript">
function click()
{
alert("click");
}
</script>
</HEAD>
<BODY>
<input type="radio" onclick="click()">
</BODY>
当我点击单选按钮时,没有任何反应,也没有错误(在Firebug中)
When I click on the radio button, nothing happens, and no errors (in Firebug)
如果我将函数的名称更改为do_click,并更改onclick,则会收到警报。
If I change the name of the function to do_click, and change the onclick, then I get the alert.
所以问题是:发生了什么? click似乎不是保留字或现有符号
So question is: what is happening? click does not appear to be a reserved word, or an existing symbol
推荐答案
内联事件处理程序中的代码范围限定为元素,好像它是在中带
块。
Code within inline event handlers is scoped to the element, as if it was in a with
block.
因此,在 onclick
handler,名称点击
解析为元素的点击
方法。
Therefore, within the onclick
handler, the name click
resolves to the element's click
method.
这可以通过编写 alert(nodeName)<演示处理程序中的/ code>
This can be demonstrated by writing alert(nodeName)
in the handler
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