Window.innerWidth

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句法
用法注意事项
范例
规范
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只读 Window property innerWidth returns the interior width of the window in pixels. This includes the width of the vertical scroll bar, if one is present.

More precisely, innerWidth returns the width of the window's layout viewport . The interior height of the window—the height of the layout viewport—can be obtained from the innerHeight 特性。

句法

let intViewportWidth = window.innerWidth;

值

An integer value indicating the width of the window's layout viewport in pixels. This property is read-only, and has no default value.

To change the window's width, use one of the Window methods for resizing windows, such as resizeBy() or resizeTo() .

用法注意事项

If you need to obtain the width of the window minus the scrollbar and borders, use the root <html> 元素的 clientWidth 特性代替。

innerWidth property is available on any window or object that behaves like a window, such as a frame or tab.

范例

// This will return the width of the viewport
var intFrameWidth = window.innerWidth;
// This will return the width of the frame viewport within a frameset
var intFrameWidth = self.innerWidth;
// This will return the width of the viewport of the closest frameset
var intFramesetWidth = parent.innerWidth;
// This will return the width of the viewport of the outermost frameset
var intOuterFramesetWidth = top.innerWidth;

规范

规范	状态	注释
CSSOM (CSS 对象模型) 视图模块 The definition of 'window.innerWidth' 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
`innerWidth`	Chrome 1	Edge 12	Firefox 1 1 不支持 4 — 24 This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188 .	IE 9	Opera 9	Safari 3	WebView Android 1	Chrome Android 18	Firefox Android 4 4 不支持 4 — 24 This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188 .	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0

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句法

值

用法注意事项

范例

规范

浏览器兼容性

图例

另请参阅

元数据

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