jquery selector 小结

  引用url上的js文件 <script src="//code.jquery.com/jquery-1.10.2.js"></script>

html元素：HTML 元素指的是从开始标签（start tag）到结束标签（end tag）的所有代码。

包括<style></style>跟<script></script>

all selector("*") -->Description: Selects all elements.

Find every element (including head, body, etc) in the document. Note that if your browser has an extension/add-on enabled that inserts a <script> or <link> element into the DOM, that element will be counted as well.