JavaScript addLoadEvent

Posted 2021-05-20

// addLoadEvent is Simon Willison's function that aloows for convenient
// addition of multiple fuctions that are all supposed to be triggered
// on window.onload event. 
// takes function name as the argument. e.g. addLoadEvent(doPopups);

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}