高效的js原生代码

1、遍历元素

//不推荐
var element = document.getElementsByTagName('div');
for(var i=0; i<element.length; i++){
    element[i].innerHTML = '111';
    element[i].style.color = 'red';
}

//推荐
var element = document.getElementsByTagName('div');
for(var i=0,e; e=element[i]; i++){
    e.innerHTML = '111';
    e.style.color = 'red';
}

//推荐
var element = document.getElementsByTagName('div');
for(var i=0; i<element.length; i++){
    var e = element[i];
    e.innerHTML = '111';
    e.style.color = 'red';
}