GamepadButton.value

GamepadButton接口下的 GamepadButton.value 属性返回一个双精浮点值来表示许多现代控制器上的模拟按钮的状态,比如说扳机键。

其值被规范于范围 0.01.0 内, 0.0 表示按钮没有被按下,1.0 则表示按钮被完全按下。

语法

var pressState = navigator.getGamepads()[0].value;
// 只读属性、双精浮点值

示例

var gp = navigator.getGamepads()[0];

if(gp.buttons[0].value > 0) {
  // 响应模拟按钮被按下
} 

一个 double (双精浮点值)。

规范

规范 状态 备注
Gamepad
GamepadButton.value
Working Draft Initial definition

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 35
Full support 35
No support 21 — 34
Prefixed
Prefixed Requires the vendor prefix: webkit
Edge Full support 12Firefox Full support 29
Full support 29
No support 24 — 28
Disabled
Disabled From version 24 until version 28 (exclusive): this feature is behind the dom.gamepad.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE No support NoOpera Full support 22
Full support 22
No support 15 — 21
Prefixed
Prefixed Requires the vendor prefix: webkit
Safari No support NoWebView Android No support NoChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support 32Opera Android No support NoSafari iOS No support NoSamsung Internet Android Full support Yes

Legend

Full support  
Full support
No support  
No support
User must explicitly enable this feature.
User must explicitly enable this feature.
Requires a vendor prefix or different name for use.
Requires a vendor prefix or different name for use.

另请参阅

使用 Gamepad API

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