Path2D() - Web APIs 编辑

Experimental

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The Path2D() constructor returns a newly instantiated Path2D object, optionally with another path as an argument (creates a copy), or optionally with a string consisting of SVG path data.

Syntax

new Path2D();
new Path2D(path);
new Path2D(d);

Parameters

path Optional

When invoked with another Path2D object, a copy of the path argument is created.

d Optional

When invoked with a string consisting of SVG path data, a new path is created from that description.

Examples

Creating and copying paths

This example creates and copies a Path2D path.

<canvas id="canvas"></canvas>

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');

let path1 = new Path2D();
path1.rect(10, 10, 100,100);

let path2 = new Path2D(path1);
path2.moveTo(220, 60);
path2.arc(170, 60, 50, 0, 2 * Math.PI);

ctx.stroke(path2);

Using SVG paths

This example creates a Path2D path using SVG path data. The path will move to point (M10 10) and then move horizontally 80 points to the right (h 80), then 80 points down (v 80), then 80 points to the left (h -80), and then back to the start (Z).

<canvas id="canvas"></canvas>

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');

let p = new Path2D('M10 10 h 80 v 80 h -80 Z');
ctx.fill(p);

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Path2D, the interface this constructor belongs to