如何在元素 html 内部添加元素数据属性值

Question

I can`t add data from id attribute to tag I have this:

<div id="id1"></div>
<div id="id2"></div>
<div id="id3"></div>

I want this:

<div id="id1">id1</div>
<div id="id2">id2</div>
<div id="id3">id3</div>

I wrote this in JS:

let divs = document.getElementsByTagName('div');

for (let div of divs) {
  divs.innerHTML=div.id;
}

But it doesn`t work, please help me.

Answer 1

You are trying to access the innerHTML property of an array ( divs ). You need to access that property of your div object, which is the current div of your loop.

 let divs = document.getElementsByTagName('div'); for (let div of divs) { // you had divs here div.innerHTML=div.id; }

 <div id="id1"></div> <div id="id2"></div> <div id="id3"></div>