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button.html
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<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
<style type="text/css">
div{
margin-top: 10px;
height: 200px;
}
</style>
</head>
<body>
<input type="button" value="设置边框" id="btnOne"/>
<input type="button" value="设置文字" id="btnTwo"/>
<div></div>
<div></div>
<div></div>
</body>
<!--
原生js
<script type="text/javascript">
window.onload = function(){ //入口函数
var btnOne = document.getElementById('btnOne');
var btnTwo = document.getElementById('btnTwo');
var divs = document.getElementsByTagName('div');
btnOne.onclick = function(){
for(var i = 0; i < divs.length; i++){
divs[i].style.border = '2px solid red';
}
}
btnTwo.onclick = function(){
for (var i = 0; i < divs.length; i++) {
divs[i].textContent = "shdshadhsah";
}
}
}
</script>
*/
-->
<script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
<script>
//1、引用jQuery文件
//2、写一个入口函数
//3、找到操作元素（jQuery选择器），操作（属性、样式、文本）
$(document).ready(function(){
$('#btnOne').click(function(){
$('div').css('border','1px solid red');
});
$('#btnTwo').click(function(){
$('div').text("你好师姐");
});
});
</script>
</html>