[javascript] Get div height with plain JavaScript

Any ideas on how to get a div's height without using jQuery?

I was searching Stack Overflow for this question and it seems like every answer is pointing to jQuery's .height().

I tried something like myDiv.style.height, but it returned nothing, even when my div had its width and height set in CSS.

In addition to el.clientHeight and el.offsetHeight, when you need the height of the content inside the element (regardless of the height set on the element itself) you can use el.scrollHeight. more info

This can be useful if you want to set the element height or max-height to the exact height of it's internal dynamic content. For example:

var el = document.getElementById('myDiv')

el.style.maxHeight = el.scrollHeight+'px'

var myDiv = document.getElementById('myDiv'); //get #myDiv
alert(myDiv.clientHeight);

clientHeight and clientWidth are what you are looking for.

offsetHeight and offsetWidth also return the height and width but it includes the border and scrollbar. Depending on the situation, you can use one or the other.

Hope this helps.

jsFiddle

var element = document.getElementById('element');
alert(element.offsetHeight);

<div id="item">show taille height</div>
<script>
    alert(document.getElementById('item').offsetHeight);
</script>

Jsfiddle

The other answers weren't working for me. Here's what I found at w3schools, assuming the div has a height and/or width set.

All you need is height and width to exclude padding.

    var height = document.getElementById('myDiv').style.height;
    var width = document.getElementById('myDiv').style.width;

You downvoters: This answer has helped at least 5 people, judging by the upvotes I've received. If you don't like it, tell me why so I can fix it. That's my biggest pet peeve with downvotes; you rarely tell me why you downvote it.

Another option is to use the getBoundingClientRect function. Please note that getBoundingClientRect will return an empty rect if the element's display is 'none'.

Example:

var elem = document.getElementById("myDiv");
if(elem) {
  var rect = elem.getBoundingClientRect();
  console.log("height: " + rect.height);  
}

UPDATE: Here is the same code written in 2020:

const elem = document.querySelector("#myDiv");
if(elem) {
  const rect = elem.getBoundingClientRect();
  console.log(`height: ${rect.height}`);
}

try

myDiv.offsetHeight 

console.log("Height:", myDiv.offsetHeight );

#myDiv { width: 100px; height: 666px; background: red}

<div id="myDiv"></div>

Here's one more alternative:

var classElements = document.getElementsByClassName("className");

function setClassHeight (classElements, desiredHeightValue) 
    {
        var arrayElements = Object.entries(classElements);
        for(var i = 0; i< arrayElements.length; i++) {
            arrayElements[i][1].style.height = desiredHeightValue;
        }

    }

One option would be

const styleElement = getComputedStyle(document.getElementById("myDiv"));
console.log(styleElement.height);