Path2D

这是 实验性技术
检查 浏览器兼容性表格 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 object. The path methods of the 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 starting at 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 starting at 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 Comment
HTML Living Standard
The definition of 'Path2D' in that specification.
实时标准

浏览器兼容性

更新 GitHub 上的兼容性数据
Desktop Mobile
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