Element.scrollWidth

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Element.scrollWidth read-only property is a measurement of the width of an element's content, including content not visible on the screen due to overflow.

scrollWidth value is equal to the minimum width the element would require in order to fit all the content in the viewport without using a horizontal scrollbar. The width is measured in the same way as clientWidth : it includes the element's padding, but not its border, margin or vertical scrollbar (if present). It can also include the width of pseudo-elements such as ::before or ::after . If the element's content can fit without a need for horizontal scrollbar, its scrollWidth 等于 clientWidth

This property will round the value to an integer. If you need a fractional value, use element.getBoundingClientRect() .

句法

var xScrollWidth = element.scrollWidth;

xScrollWidth is the width of the content of element (以像素为单位)。

范例

<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
    <style>
        div {
            overflow: hidden;
            white-space: nowrap;
            text-overflow: ellipsis;
        }
        #aDiv {
            width: 100px;
        }
        button {
            margin-bottom: 2em;
        }
    </style>
</head>
<body>
    <div id="aDiv">
        FooBar-FooBar-FooBar-FooBar
    </div>
    <button id="aButton">
        Check for overflow
    </button>
    <div id="anotherDiv">
        FooBar-FooBar-FooBar-FooBar
    </div>
    <button id="anotherButton">
        Check for overflow
    </button>
</body>
<script>
    var buttonOne = document.getElementById('aButton'),
    buttonTwo = document.getElementById('anotherButton'),
    divOne = document.getElementById('aDiv'),
    divTwo = document.getElementById('anotherDiv');
    //check to determine if an overflow is happening
    function isOverflowing(element) {
        return (element.scrollWidth > element.offsetWidth);
    }
    function alertOverflow(element) {
        if (isOverflowing(element)) {
            alert('Contents are overflowing the container.');
        } else {
            alert('No overflows!');
        }
    }
    buttonOne.addEventListener('click', function() {
        alertOverflow(divOne);
    });
    buttonTwo.addEventListener('click', function() {
        alertOverflow(divTwo);
    });
</script>
</html>

结果

规范

规范	状态	注释
CSSOM (CSS 对象模型) 视图模块 The definition of 'Element.scrollWidth' in that specification.	工作草案	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`scrollWidth`	Chrome 43	Edge 12	Firefox Yes	IE 5 5 In Internet Explorer 5 through 7, if padding is set, the value of `scrollWidth` is equal to the sum of the left and right padding. This behavior was fixed in Internet Explorer 8.	Opera Yes	Safari 6	WebView Android Yes	Chrome Android 43	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android 4.0

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句法

范例

结果

规范

浏览器兼容性

图例

另请参阅

元数据

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