The Element.scrollLeft property gets or sets the number of pixels that an element's content is scrolled to the left.

Note that if the element's direction of the element is rtl (right-to-left) then scrollLeft is 0 when the scrollbar is at its rightmost position (at start of the scrolled content) and then increasingly negative as you scroll towards the end of the content.

On systems using display scaling, scrollLeft may give you a decimal value.


// Get the number of pixels scrolled
var sLeft = element.scrollLeft;

sLeft is an integer representing the number of pixels that element has been scrolled to the left.

// Set the number of pixels scrolled
element.scrollLeft = 10;

scrollLeft can be set to any integer value, however:

  • If the element can't be scrolled (e.g. it has no overflow), scrollLeft is set to 0.
  • If set to a value less than 0 (greater than 0 for right-to-left elements), scrollLeft is set to 0.
  • If set to a value greater than the maximum that the content can be scrolled, scrollLeft is set to the maximum.


<!DOCTYPE html>
    <meta charset="utf-8">
        #container {
            border: 1px solid #ccc; height: 100px; overflow: scroll; width: 100px;
        #content {
            background-color: #ccc; width: 250px;
        document.addEventListener('DOMContentLoaded', function () {   
            var button = document.getElementById('slide');
            button.onclick = function () {
                document.getElementById('container').scrollLeft += 20;
        }, false);
    <div id="container">
        <div id="content">Lorem ipsum dolor sit amet.</div>
    <button id="slide" type="button">Slide</button>


Specification Status Comment
CSS Object Model (CSSOM) View Module
The definition of 'scrollLeft' in that specification.
Working Draft  

Browser compatibility

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MSDN: scrollLeft Property