javascript 使用“this”对象的 onmouseover 和内联函数
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onmouseover and inline function using the 'this' object
提问by Matt
I have the following bit of code:
我有以下代码：
<div id="some_div" style="border: solid 1px red; width:50px; height: 50px;"
onmouseover="(function(){$(this).css('background','green');})();"></div>
The function gets run just fine but it doesn't seem to be able to find the 'this'. How can I make it so that it will know to self-reference?
该函数运行得很好，但似乎无法找到“this”。我怎样才能让它知道自我参考？
(Yes, jquery is referenced in my code)
（是的，我的代码中引用了 jquery）
采纳答案by Paul
I don't know if you want to be using an anonymous function there. I think
我不知道你是否想在那里使用匿名函数。我认为
<div id="some_div" style="border: solid 1px red; width:50px; height: 50px;"
onmouseover="$(this).css('background','green');"></div>
will work.
将工作。
回答by Dogbert
If you really need to wrap it up in an anonymous function, you can do this.
如果你真的需要将它封装在一个匿名函数中，你可以这样做。
onmouseover="(function(that){$(that).css('background','green');})(this);"
回答by beatgammit
This is going to be messed up because you're executing the function. Let's break this up a little.
这将被搞砸，因为您正在执行该功能。让我们稍微分解一下。
If this was not inline, it would look like this:
如果这不是内联的，它看起来像这样：
onmouseover = (function(){
$(this).css('background','green');
})();
Notice the () at the end? This means you're executing the code before the function gets assigned to onmouseover.
注意到最后的 () 了吗？这意味着您正在将函数分配给 onmouseover 之前执行代码。
Try this instead:
试试这个：
<div id="some_div" style="border: solid 1px red; width:50px; height: 50px;"
onmouseover="$(this).css('background','green');"></div>
<div id="some_div" style="border: solid 1px red; width:50px; height: 50px;"
onmouseover="$(this).css('background','green');"></div>
回答by Aristos
@matt you can do the same with css, just by using the :hoveron the class.
@matt 你可以用 css 做同样的事情，只需:hover在类上使用。
.SomeDiv
{
border: solid 1px red;
width:50px;
height: 50px;
/*remove the below line if you like to keep the hover color*/
background-color:white;
}
.SomeDiv:hover
{
background-color:green;
}
and
和
<div id="some_div" class="SomeDiv"></div>
回答by casraf
Seems you're using jQuery, why not do it all the way
好像你在用 jQuery，为什么不一直用
$('#tag').hover(function() { $(this).css('background', 'green'); });<div id="tag"> ... </div>