通过Javascript将自定义属性添加到HTML元素

Question

I am trying to add a custom element to Select html element. 我正在尝试为Select html元素添加自定义元素。

 var sel=document.getElementById("sel1");
  sel.setAttribute("customprop","blabla");

In chrome it works, in IE8 it doesn't. 在Chrome中它可以工作，在IE8中它没有。

NO JQUERY 没有遗憾

Answer 1

It seems you need to add doctype on top of your page: 您似乎需要在页面顶部添加doctype：

<!DOCTYPE html>

and then the following tag inside your head element to make setAttribute work: 然后在head元素中使用以下标记使setAttribute工作：

<meta http-equiv="X-UA-Compatible" content="IE=edge" />