JavaScript DOM脚本与jQuery 1：“Hola mundo”

Posted 2021-05-20

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

function mostrarVentana(){
	alert('Hola mundo sin jQuery');
}

addLoadEvent(mostrarVentana);


/*jQuery*/
$(document).ready(function(){
	alert('Hola mundo con jQuery');
});