Static windowResized 

pub static windowResized: WindowResizedInternalType

The windowResized() function is called once every time the browser window is resized. This is a good place to resize the canvas or do any other adjustments to accommodate the new window size.

Examples

function setup() {
  createCanvas(windowWidth, windowHeight);
}

function draw() {
  background(0, 100, 200);
}

function windowResized() {
  resizeCanvas(windowWidth, windowHeight);
}