Screen.availLeft

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句法
范例
注意事项
浏览器兼容性
相关话题

非标
此特征是非标准的，且不在标准轨道中。不要在面向 Web 的生产站点中使用它：它不适用于每个用户。实现之间可能存在大的不兼容性，且行为将来可能改变。

Returns the first available pixel available from the left side of the screen.

句法

let availLeft = window.screen.availLeft;

范例

let setX = window.screen.width - window.screen.availLeft;
let setY = window.screen.height - window.screen.availTop;
window.moveTo(setX, setY);

注意事项

In most cases, this property returns 0.

If you work with two screens this property, evaluated on the right screen, returns the width of the left one in pixels (thereby indicating the X coordinate of the left edge of the screen on the right).

On Windows, this property depends on which screen is set as your primary, returning the X coordinate of the leftmost available pixel relative to the primary screen. That is, the primary screen's left edge always has the X coordinate 0, even if it's not the leftmost screen. If the secondary screen is to the left of the primary screen, it has a negative X coordinate to compensate:

[1] [2] - on left screen availLeft 返回 0 , on the right screen it returns the width of the left one

[2] [1] - on left screen availLeft 返回 -width of that screen, on the right screen, it returns 0

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
`availLeft` 非标	Chrome Yes	Edge 79	Firefox Yes	IE ?	Opera Yes	Safari 6	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes

图例

完整支持
兼容性未知 ?
非标。预期跨浏览器支持较差。

元数据

最后修改： May 25, 2019

CSS Object Model
Screen
特性
1. availHeight
2. availLeft
3. availTop
4. availWidth
5. colorDepth
6. height
7. left
8. mozBrightness
9. mozEnabled
10. onorientationchange
11. orientation
12. pixelDepth
13. top
14. width
方法
1. lockOrientation()
2. unlockOrientation()
继承：
1. EventTarget
Related pages for CSSOM

在此页

句法

范例

注意事项

浏览器兼容性

图例

相关话题