How to detect right click + left click

Question

I am building a game

And I need to do something when the user clicks on the right mouse button, holds it and then presses the left button

Answer 1

for right click use oncontextmenu and for left just set up click , just disable their default behaviours if you want too, ex:

var left = 0,
  right = 0;

document.onclick = function() {
  console.log(++left);
  return false;
};

document.oncontextmenu = function() {
  console.log(++right);
  return false;
};