如何将属性 ID 的值存储到变量中?Jquery Javascript

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时间:2020-10-25 18:15:27  来源:igfitidea点击:

How to store the value of attribute ID to a variable? Jquery Javascript

jqueryattributesjavascript

提问by TaylorMac

Ok, so this is probably obvious.

好的,所以这可能是显而易见的。

I need to get the ID of a clicked div:

我需要获取点击的 div 的 ID:

$("div.editable").click(function(e) {  
  var editid = $(this).attr("id");  
});  

And the use that ID in a function w/parameters:

并在带有参数的函数中使用该 ID:

ajaxStyle(value, 2, editid)

But it doesn't work when I write it like this. It either returns "undefined" or just doesn't work.

但是当我这样写时它不起作用。它要么返回“未定义”,要么就是不工作。

回答by Johnner

var editid;
$("div.editable").click(function(e) {
   editid = $(this).attr("id");
}); 

It's all about function scope.

这都是关于函数作用域的。

回答by Oded

You are declaring your editidvariable within a function, so it is only visible within it and not defined outside of it.

editid在函数中声明变量,因此它仅在函数内部可见,而不能在函数外部定义。

This will work (though will pollute the global namespace):

这将起作用(尽管会污染全局命名空间):

var editid;
$("div.editable").click(function(e) {  
  editid = $(this).attr("id");  
});