DOMPointInit | Web API

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DOMPointInit dictionary is used to provide the values of the coordinates and perspective when creating and JSONifying a DOMPoint or DOMPointReadOnly 对象。

It's used as an input parameter to the DOMPoint / DOMPointReadOnly 方法 fromPoint() . It's used as the return value when calling toJSON() .

特性

DOMPointInit.x: An unrestricted floating-point value indicating the x -coordinate of the point in space. This is generally the horizontal coordinate, with positive values being to the right and negative values to the left. The default value is 0 .
DOMPointInit.y: An unrestricted floating-point number providing the point's y -coordinate. This is the vertical coordinate, and barring any transforms applied to the coordinate system, positive values are downward and negative values upward toward the top of the screen. The default is 0 .
DOMPointInit.z: An unrestricted floating-point value which gives the point's z -coordinate, which is (assuming no transformations that alter the situation) the depth coordinate; positive values are closer to the user and negative values retreat back into the screen. The default value is 0 .
DOMPointInit.w: The point's w perspective value, given as an unrestricted floating-point number. The default is 1 .

范例

This example creates a new DOMPoint representing the top-left corner of the current window, with a z component added to move the point closer to the user. This same code will work to create a DOMPointReadOnly object; just change the interface name in the code.

const pointDesc = {
  x: window.screenX,
  y: window.screenY,
  z: 5.0
};
const windTopLeft = DOMPoint.fromPoint(pointDesc)

规范

规范	状态	注释
Geometry Interfaces Module Level 1 The definition of 'DOMPointReadOnly.fromPoint()' in that specification.	候选推荐	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
`DOMPointInit`	Chrome ?	Edge ?	Firefox 62	IE No	Opera ?	Safari No	WebView Android ?	Chrome Android ?	Firefox Android 62	Opera Android ?	Safari iOS No	Samsung Internet Android ?
`w`	Chrome ?	Edge ?	Firefox 62	IE No	Opera ?	Safari No	WebView Android ?	Chrome Android ?	Firefox Android 62	Opera Android ?	Safari iOS No	Samsung Internet Android ?
`x`	Chrome ?	Edge ?	Firefox 62	IE No	Opera ?	Safari No	WebView Android ?	Chrome Android ?	Firefox Android 62	Opera Android ?	Safari iOS No	Samsung Internet Android ?
`y`	Chrome ?	Edge ?	Firefox 62	IE No	Opera ?	Safari No	WebView Android ?	Chrome Android ?	Firefox Android 62	Opera Android ?	Safari iOS No	Samsung Internet Android ?
`z`	Chrome ?	Edge ?	Firefox 62	IE No	Opera ?	Safari No	WebView Android ?	Chrome Android ?	Firefox Android 62	Opera Android ?	Safari iOS No	Samsung Internet Android ?

图例

完整支持
不支持
兼容性未知 ?
实验。期望将来行为有所改变。

元数据

最后修改： May 31, 2020

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特性

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浏览器兼容性

图例

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