createCanvas(200,200).mousePressed(()=>{

    console.log("callback canvas", arguments.length)

  });

  let button = createButton('button');

  button.mousePressed(()=>{

    console.log("callback button", arguments.length)

  });

}

​

function draw() {

  background(220);

}

​

function mousePressed(e) {

  console.log("event", e);

}