在此页

• 构造函数
• 特性
• 范例
• 规范
• 浏览器兼容性
• 相关话题

Magnetometer 接口在 Sensor APIs provides information about the magnetic field as detected by the device’s primary magnetometer sensor.

To use this sensor, the user must grant permission to the 'magnetometer' device sensor through the 权限 API。

If a feature policy blocks use of a feature, it's because your code is inconsistent with the policies set on your server. This is not something that would ever be shown to a user. See Feature-Policy for implementation instructions.

构造函数

Magnetometer.Magnetometer()

创建新的 Magnetometer 对象。

特性

Magnetometer.x 只读

Returns a double containing the magnetic field around the device's x axis.

Magnetometer.y 只读

Returns a double containing the magnetic field around the device's y axis.

Magnetometer.z 只读

Returns a double containing the magnetic field around the device's z axis.

范例

The magnetometer is typically read in the Sensor.onreading event callback. In the example below this occurs sixty times a second.

let magSensor = new Magnetometer({frequency: 60});
magSensor.addEventListener('reading', e => {
  console.log("Magnetic field along the X-axis " + magSensor.x);
  console.log("Magnetic field along the Y-axis " + magSensor.y);
  console.log("Magnetic field along the Z-axis " + magSensor.z);
});
magSensor.start();
					

规范

规范	状态	注释
Generic Sensor API	候选推荐	Defines sensors in general.
Magnetometer The definition of 'Magnetometer' in that specification.	候选推荐

浏览器兼容性

The compatibility table in 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
Magnetometer	Chrome 69	Edge ≤79	Firefox ?	IE ?	Opera 56	Safari ?	WebView Android 69	Chrome Android 69	Firefox Android ?	Opera Android 48	Safari iOS ?	Samsung Internet Android 10.0
Magnetometer() 构造函数	Chrome 69	Edge ≤79	Firefox ?	IE ?	Opera 56	Safari ?	WebView Android 69	Chrome Android 69	Firefox Android ?	Opera Android 48	Safari iOS ?	Samsung Internet Android 10.0
x	Chrome 69	Edge ≤79	Firefox ?	IE ?	Opera 56	Safari ?	WebView Android 69	Chrome Android 69	Firefox Android ?	Opera Android 48	Safari iOS ?	Samsung Internet Android 10.0
y	Chrome 69	Edge ≤79	Firefox ?	IE ?	Opera 56	Safari ?	WebView Android 69	Chrome Android 69	Firefox Android ?	Opera Android 48	Safari iOS ?	Samsung Internet Android 10.0
z	Chrome 69	Edge ≤79	Firefox ?	IE ?	Opera 56	Safari ?	WebView Android 69	Chrome Android 69	Firefox Android ?	Opera Android 48	Safari iOS ?	Samsung Internet Android 10.0

图例

完整支持

完整支持

兼容性未知 ?

兼容性未知

元数据

• 最后修改： May 19, 2019

相关话题

1. Magnetometer
2. 构造函数

   1. Magnetometer()
3. 特性

   1. x
   2. y
   3. z
4. 继承：

   1. 传感器
   2. EventTarget