DOMPointInit.x | Web API

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DOMPointInit dictionary's x property is used to specify the x component of a point in 2D or 3D space when either creating or serializing a DOMPoint or DOMPointReadOnly .

In general, positive values x mean to the right, and negative values of x means to the left, assuming that transforms have not altered the orientation of the axes.

句法

var DOMPointInit = {
  x: xPos
};
DOMPointInit.x = xPos;
var xPos = DOMPointInit.x;

值

A double-precision floating-point value indicating the point's x coordinate. This value is unrestricted , meaning that it is allowed to be infinite or invalid (that is, its value may be NaN or ±Infinity ).

If this property is missing when the DOMPointInit object is passed into fromPoint() , the value is assumed to be 0 by default.

DOMPointInit is used as an input when calling either DOMPointReadOnly.fromPoint() or DOMPoint.fromPoint() , and is returned by the DOMPointReadOnly.toJSON() and DOMPoint.toJSON() 方法。

规范

规范	状态	注释
Geometry Interfaces Module Level 1 The definition of 'x' 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
`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 ?

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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： Mar 18, 2019

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