The CanvasRenderingContext2D.canvas property, part of the Canvas API, is a read-only reference to the HTMLCanvasElement object that is associated with a given context.
A HTMLCanvasElement object.
Given this <canvas> element:
<canvas id="canvas"></canvas>… you can get a reference to the canvas element within the CanvasRenderingContext2D by using the canvas property:
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
ctx.canvas; // HTMLCanvasElementCanvasRenderingContext2D interface