CanvasRenderingContext2D：canvas 属性

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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Canvas API 的 CanvasRenderingContext2D.canvas 属性是对与给定上下文关联的 HTMLCanvasElement 对象的只读引用。如果没有与之关联的 <canvas> 元素，对象值为 null。

值

给出 <canvas> 元素：

html

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

你可以通过 CanvasRenderingContext2D 调用内部的 canvas 属性，获取 canvas 元素的引用：

const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
ctx.canvas; // HTMLCanvasElement

Specification
HTML # dom-context-2d-canvas-dev