{"action":"opened","issue":{"url":"https://api.github.com/repos/HwangJianyi/byHJY/issues/3","repository_url":"https://api.github.com/repos/HwangJianyi/byHJY","labels_url":"https://api.github.com/repos/HwangJianyi/byHJY/issues/3/labels{/name}","comments_url":"https://api.github.com/repos/HwangJianyi/byHJY/issues/3/comments","events_url":"https://api.github.com/repos/HwangJianyi/byHJY/issues/3/events","html_url":"https://github.com/HwangJianyi/byHJY/issues/3","id":150668939,"number":3,"title":"4_23HTML和CSS学习笔记","user":{"login":"HwangJianyi","id":18459985,"avatar_url":"https://avatars.githubusercontent.com/u/18459985?v=3","gravatar_id":"","url":"https://api.github.com/users/HwangJianyi","html_url":"https://github.com/HwangJianyi","followers_url":"https://api.github.com/users/HwangJianyi/followers","following_url":"https://api.github.com/users/HwangJianyi/following{/other_user}","gists_url":"https://api.github.com/users/HwangJianyi/gists{/gist_id}","starred_url":"https://api.github.com/users/HwangJianyi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/HwangJianyi/subscriptions","organizations_url":"https://api.github.com/users/HwangJianyi/orgs","repos_url":"https://api.github.com/users/HwangJianyi/repos","events_url":"https://api.github.com/users/HwangJianyi/events{/privacy}","received_events_url":"https://api.github.com/users/HwangJianyi/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-04-24T14:52:25Z","updated_at":"2016-04-24T14:52:25Z","closed_at":null,"body":"#学习笔记\r\n##HTML\r\n1.HTML是一种标记语言。能够构建网页的基本结构，网页所需要传达的内容，一般都是由HTML来编写。<br>\r\n2.HTML具有简易性、平台无关性、可扩展性以及容错性。虽然HTML给予我们很大的编写自由，但是我们仍然需要注意标签的闭合和表达的语义。（例如em和strong，都具有强调的作用。strong更加注意逻辑上的强调，也就是语气强调。）<br>\r\n3.<!DOCTYPE html>是指示文档类型，告诉浏览器怎么解释html。<br>\r\n4.元素由开始标记、内容、结束标记构成。分为内联元素和块级元素。<br>  \r\n4.1.内联元素：默认宽高，不换行，只容内联元素。<br>\r\n4.2.块级元素：宽高可调，换新行，可以包含块级和内联元素。<br>\r\n4.3.display，可以将内联元素和块级元素转换，令其具有对方的特点。<br>\r\n4.4.标签：应该小写，语义化，成对出现。<br>\r\n5.XHTML:X的意思是可扩展，对比与HTML,使用规范更严格。<br>\r\n6.HTML开发工具推荐：Sublime Text 3。<br>\r\n##CSS\r\n1.CSS用于控制网页样式。<br>\r\n2.CSS有三种布局:(1)固定布局：内容固定大小。(2)流式布局：内容区不固定大小，能够更好的利用页面。(3)响应式布局：较好的兼容移动端和PC端，基于流式布局和媒体结构。<br>\r\n"}}