(function(){
var typewriter=document.querySelector(".typewriter"),
code=typewriter.innerHTML,
pos=0,
len=code.length;
typewriter.innerHTML="";
typewriter.style.display="block";
function typewriting(){
pos++;
if(pos<=len)
{
switch(code.charAt(pos))
{
case "<":
pos=code.indexOf(">",pos);
break;
case "&":
pos=code.indexOf(";",pos);
break;
}
typewriter.innerHTML=code.substring(0,pos);
setTimeout(typewriting,100);
}
else
{
typewriter.classList.add("gameover");
}
}
typewriting();
})();效果是：
