標籤：
index.html
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>基礎核心</title>
<script type="text/javascript" src="jquery-1.10.1.js"></script>
<script type="text/javascript" src="demo.js"></script>
</head>
demo.js
alert($ === jQuery); //相等、恒等
$(function () {
alert($);//jQuery對象的內部
alert($());//返回的jQuery對象
alert($(‘#box‘));//返回的也是jQuery對象
alert($(‘#box‘).css(‘color‘, ‘red‘));//返回的jQuery對象
$(‘#box‘).css(‘color‘, ‘red‘).css(‘font-size‘, ‘200px‘).css(‘font-weight‘, ‘bold‘);
});
$(function () {
alert($(‘#box‘));//返回jQuery對象
alert(document.getElementById(‘box‘));//[object HTMLDivElement]，原生DOM對象
alert($(‘#box‘).get(0));//[object HTMLDivElement]
alert($(document.getElementById(‘box‘)).css(‘color‘, ‘red‘));//jQuery對象和DOM對象之間的互換
});
jQuery 基本使用
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