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這是一個實驗中的功能
此功能在某些瀏覽器尚在開發中,請參考兼容表格以得到不同瀏覽器用的前輟。

Screen.orientation 屬性可以取得螢幕目前的方向。

語法

var orientation = window.screen.orientation.type;

回傳值

回傳值為一個代表螢幕方向的字串,可能是 portrait-primaryportrait-secondarylandscape-primarylandscape-secondary(請參考 lockOrientation 以瞭解更多資訊)。

範例

var orientation = screen.orientation || screen.mozOrientation || screen.msOrientation;

if (orientation.type === "landscape-primary") {
  console.log("That looks good.");
} else if (orientation.type === "landscape-secondary") {
  console.log("Mmmh... the screen is upside down!");
} else if (orientation.type === "portrait-secondary" || orientation.type === "portrait-primary") {
  console.log("Mmmh... you should rotate your device to landscape");
}

規範

Specification Status Comment
Screen Orientation API
The definition of 'Screen Orientation' in that specification.
Working Draft Initial definition

瀏覽器相容性

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 38 (Yes) moz[1] 11ms[2] 25 No support
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support 39 (Yes) moz[1] No support No support No support

[1] This API is only implemented as a prefixed method (mozOrientation) in B2G and Firefox for Android.

[2] This API is implemented using a prefix (msOrientation) in Internet Explorer for Windows 8.1 and Windows RT 8.1. It is not supported on Windows 7.

參見

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