canvas.js

class Canvas {
  constructor(x, y) {
    this.x = x
    this.y = y
    this.canvas = document.createElement("canvas")
    this.ctx = this.canvas.getContext("2d")

    document.body.appendChild(this.canvas)
    this.ctx.fillStyle = "rgb(51, 51, 51)"
    this.ctx.fillRect(0, 0, x, y)
  }

  setColor(color) {
    this.ctx.fillStyle(color)
    // console.log(this.ctx)
  }
}

let canvas = new Canvas(400, 800)
canvas.setColor("#FF0000")