在此页

• 构造函数
• 特性
• 静态方法
• 方法
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

DOMPointReadOnly interface specifies the coordinate and perspective fields used by DOMPoint to define a 2D or 3D point in a coordinate system.

注意： 此特征可用于 Web 工作者 .

There are two ways to create a new DOMPointReadOnly instance. First, you can use its constructor, passing in the values of the parameters for each dimension and, optionally, the perspective:

/* 2D */
const point = new DOMPointReadOnly(50, 50);
/* 3D */
const point = new DOMPointReadOnly(50, 50, 25);
/* 3D with perspective */
const point = new DOMPointReadOnly(100, 100, 100, 1.0);
				

The other option is to use the static DOMPointReadOnly.fromPoint() 方法：

const point = DOMPointReadOnly.fromPoint({x: 100, y: 100, z: 50; w: 1.0});
				

构造函数

DOMPointReadOnly()

创建新的 DOMPointReadOnly object given the values of its coordinates and perspective. To create a point using a DOMPointInit object, you can instead use DOMPointReadOnly.fromPoint() .

特性

DOMPointReadOnly.x 只读

The point's horizontal coordinate, x .

DOMPointReadOnly.y 只读

The point's vertical coordinate, y .

DOMPointReadOnly.z 只读

The point's depth coordinate, z .

DOMPointReadOnly.w 只读

The point's perspective value, w .

静态方法

DOMPointReadOnly.fromPoint()

A static method that creates a new DOMPointReadOnly object given the coordinates provided in the specified DOMPointInit 对象。

方法

matrixTransform()

Applies a matrix transform specified as a DOMMatrixInit 对象到 DOMPointReadOnly 对象。

toJSON()

Returns a JSON representation of the DOMPointReadOnly 对象。

规范

规范	状态	注释
Geometry Interfaces Module Level 1 The definition of 'DOMPoint' in that specification.	候选推荐	Latest spec version is an ED.

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
DOMPointReadOnly	Chrome 61	Edge 79	Firefox 31	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android 31	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0
DOMPointReadOnly() 构造函数	Chrome 61	Edge 79	Firefox 31	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android 31	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0
fromPoint() static function	Chrome 61	Edge 79	Firefox 31	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android 31	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0
matrixTransform() 弃用	Chrome 61	Edge 79	Firefox 31	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android 31	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0
toJSON()	Chrome 61	Edge 79	Firefox 62	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android 62	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0
w	Chrome 61	Edge 79	Firefox 31	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android 31	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0
Available in workers	Chrome 61	Edge 79	Firefox 69	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android No	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0
x	Chrome 61	Edge 79	Firefox 31	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android 31	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0
y	Chrome 61	Edge 79	Firefox 31	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android 31	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0
z	Chrome 61	Edge 79	Firefox 31	IE No	Opera 48	Safari 10.1	WebView Android 61	Chrome Android 61	Firefox Android 31	Opera Android 45	Safari iOS 10.3	Samsung Internet Android 8.0

图例

完整支持

完整支持

不支持

不支持

弃用。不要用于新网站。

弃用。不要用于新网站。

另请参阅

• DOMPoint
• DOMRect
• DOMMatrix

元数据

• 最后修改： May 31, 2020

相关话题

1. DOMPointReadOnly
2. 构造函数

   1. DOMPointReadOnly()
3. 特性

   1. w
   2. x
   3. y
   4. z
4. 方法

   1. fromPoint()
   2. toJSON()
5. Related pages for Geometry Interfaces

   1. CSSMatrix
   2. DOMMatrix
   3. DOMMatrixReadOnly
   4. 点