How to clear the canvas for redrawing

Question

After experimenting with composite operations and drawing images on the canvas I\'m now trying to remove images and compositing. How do I do this?

I need to clear th

Answer 1

Given that canvas is a canvas element,

const context = canvas.getContext('2d');

context.clearRect(0, 0, canvas.width, canvas.height);

Answer 2

This is what I use, regardless boundaries and matrix transformations:

function clearCanvas(canvas) {
  const ctx = canvas.getContext('2d');
  ctx.save();
  ctx.globalCompositeOperation = 'copy';
  ctx.strokeStyle = 'transparent';
  ctx.beginPath();
  ctx.lineTo(0, 0);
  ctx.stroke();
  ctx.restore();
}

Basically, it saves the current state of the context, and draws a transparent pixel with copy as globalCompositeOperation. Then, restores the previous context state.

Answer 3

function clear(context, color)
{
    var tmp = context.fillStyle;
    context.fillStyle = color;
    context.fillRect(0, 0, context.canvas.width, context.canvas.height);
    context.fillStyle = tmp;
}

Answer 4

A quick way is to do

canvas.width = canvas.width

Idk how it works but it does!

Answer 5

Context.clearRect(starting width, starting height, ending width, ending height);

Example: context.clearRect(0, 0, canvas.width, canvas.height);