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element.scrollLeft

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.

Syntax

// 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.

Example

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

Specifications

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

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	Yes	Yes	Yes	Yes	Yes	Yes

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Yes	Yes	Yes	Yes	Yes	Yes	Yes

References

MSDN: scrollLeft Property

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https://developer.mozilla.org/en-US/docs/Web/API/element/scrollLeft