在此页

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

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

Path2D interface of the Canvas 2D API is used to declare a path that can then be used on a CanvasRenderingContext2D 对象。 path methods 的 CanvasRenderingContext2D interface are also present on this interface, which gives you the convenience of being able to retain and replay your path whenever desired.

构造函数

Path2D()

Path2D constructor. Creates a new Path2D 对象。

方法

Path2D.addPath()

Adds a path to the current path.

Path2D.closePath()

Causes the point of the pen to move back to the start of the current sub-path. It tries to draw a straight line from the current point to the start. If the shape has already been closed or has only one point, this function does nothing.

Path2D.moveTo()

Moves the starting point of a new sub-path to the ( x, y ) coordinates.

Path2D.lineTo()

Connects the last point in the subpath to the ( x, y ) coordinates with a straight line.

Path2D.bezierCurveTo()

Adds a cubic Bézier curve to the path. It requires three points. The first two points are control points and the third one is the end point. The starting point is the last point in the current path, which can be changed using moveTo() before creating the Bézier curve.

Path2D.quadraticCurveTo()

Adds a quadratic Bézier curve to the current path.

Path2D.arc()

Adds an arc to the path which is centered at ( x, y ) position with radius r 起始于 startAngle and ending at endAngle going in the given direction by anticlockwise (defaulting to clockwise).

Path2D.arcTo()

Adds a circular arc to the path with the given control points and radius, connected to the previous point by a straight line.

Path2D.ellipse()

Adds an elliptical arc to the path which is centered at ( x, y ) position with the radii radiusX and radiusY 起始于 startAngle and ending at endAngle going in the given direction by anticlockwise (defaulting to clockwise).

Path2D.rect()

Creates a path for a rectangle at position ( x, y ) with a size that is determined by width and height .

规范

规范	状态	注释
HTML 实时标准 The definition of 'Path2D' in that specification.	实时标准

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
Path2D	Chrome Yes	Edge ≤18	Firefox 31	IE ?	Opera Yes	Safari 10	WebView Android Yes	Chrome Android Yes	Firefox Android 31	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
Path2D() 构造函数	Chrome Yes	Edge ≤18 注意事项 ≤18 注意事项 The constructor for Path2D objects in Edge does not support being invoked with a string consisting of SVG path data. See issue 8438884 了解细节。	Firefox 31	IE ?	Opera Yes	Safari 10	WebView Android 不支持 No	Chrome Android 42	Firefox Android 31	Opera Android Yes	Safari iOS Yes	Samsung Internet Android 4.0
addPath	Chrome Yes	Edge ≤79	Firefox 34	IE 不支持 No	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 34	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

完整支持

不支持

不支持

兼容性未知 ?

兼容性未知

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

见实现注意事项。

另请参阅

• CanvasRenderingContext2D

元数据

• 最后修改： Apr 15, 2020

相关话题

1. 画布 API
2. Path2D
3. 构造函数

   1. Path2D()
4. 方法

   1. addPath()
5. Related pages for Canvas API

   1. Canvas
   2. CanvasGradient
   3. CanvasImageSource
   4. CanvasPattern
   5. CanvasRenderingContext2D
   6. HTMLCanvasElement
   7. ImageBitmap
   8. ImageBitmapFactories
   9. ImageBitmapRenderingContext
   10. ImageData
   11. OffscreenCanvas
   12. RenderingContext
   13. TextMetrics