Notes organized by h5

tag

UpdateSemantictag

    header标签
    nav标签
    section标签
    article标签
    aside标签
    widget标签
    footer标签

Why there are semantic tags

能够便于开发者阅读和写出更优雅的代码，代码如诗
同时让浏览器或是网络爬虫可以很好地解析，从而更好分析其中的内容
更好地搜索引擎优化

切记：HTML的职责是描述一块内容是什么（或其意义）而不是它长的什么样子，它的外观应该由CSS来决定。

Application tag

[datalist(data list)]

datalist The presentation of the data list requires a carrier

            <input>
            <datalist>
                <option></option>
                <option></option>
            </datalist>

            <input>
            <datalist>
                <option></option>
                <option></option>
            </datalist>

[progress (Progress bar)]

To change its style, you need to first change -webkit- appearanceSet to none

            <style>
                .my_progress{
                    -webkit-appearance:none;
                }
                .my-progress::-webkit-progress-bar{
                    //样式
                }
            </style>
            <progress></progress>

[meter (numeric display)]

Very few browsers support

            <meter></meter>

The maximum and minimum values ​​of the display: max, min
The maximum and minimum values ​​that the display can reach: high, low
The best value of the measurement range of the display: optimal
The current value displayed by the display: value

[menu (right-click menu)]

Firefox compatible

[details]

Click on a content to expand the panel, compatible with Firefox and Google

Properties

Link relationship description: used to describe the relationship between the specified link and the current document, to facilitate the machine to understand the document structure

Common link relationship table

    alternate       文档的可选版本（例如打印页、翻译页或镜像）
    stylesheet      文档的外部样式表
    start           集合中的第一个文档
    next            集合中的下一个文档
    prev            集合中的前一个文档
    contents        文档目录
    index           文档索引
    glossary        文档中所用字词的术语表或解释
    copyright       包含版权信息的文档
    chapter         文档的章
    section         文档的节
    subsection      文档的子段
    appendix        文档附录
    help            帮助文档
    bookmark        相关文档
    nofollow        用于指定 Google 搜索引擎不要跟踪链接
    licence         一般用于文献，表示许可证的含义
    tag             标签集合
    friend          友情链接


    案例

    <link>
    <link>
    <a>上一页</a>
    <a>下一页</a>

    <link>
    <link>
    <link>
    <link>
    <link>

    <a>old posts</a>
    <a>tutorial</a>
    <a>license</a>
    <a>wannabe</a>
    <a>games posts</a>

Structured data tag

Advanced stuff, currently only supported by Google
is to make it easy to crawl the data on the webpage

<p>
      </p><p>我叫
        <span>汪磊</span>。
      </p>
      <p>我养了一条叫
        <span>旺财</span>的
        <span>金毛</span>犬。
      </p>


        比如抓取出：
        主人：汪磊
        狗名：旺财
        品种：金毛

ARIA

####Accessible Rich Internet Application (无障碍富互联网应用程序)
    主要针对于屏幕阅读设备(e.g. NVDA)，更快更好地理解网页
    不仅仅是为了盲人用户，更多语义化
1.数据注解，类似lable，只不过label是针对表格
2.可以通过aria知道数据的强相关

aria由一套属性组成，属性分为role以及对应的states和properties，
aria将html元素分为六种role，每种有对应的states和properties，
但有一些是共用的，比如

        aria-atomic
        aria-busy(state)
        aria-describedby
        aria-disabled(state)
        aria-dropeffect
        aria-flowto
        aria-haspopup
        aria-hidden(state)
        aria-invalid(state)
        aria-label
        aria-labelledby
        aria-owns
        aria-relevant

        举个伪元素例子，

        <p>单选tabindex="0"</p>

        这个p模拟了radio的功能，在平时读屏软件是分辨不出来的，
        但是加上role及aria-checked状态，
        在读屏软件（NVDA）中读出来就是：

单选2 单选按钮 选中 第1页 共1项

For detailed attributes, see: ARIA Tenpay Design Center.html

Custom attribute data

通过DOM存储与DOM对象强相关的数据

1.可以给html里的所有dom对象都可以添加一些data-xxx的属性
2.用来记录与当前DOM强相关的数据

  
• 张三
  
• 李四
  
• 王二

Case 1:

##

        <script>
        //键是ID 值是信息
            var data = {
                01:{
                    name:"伟哥哥"，
                    age:"18"
                },
                02:{
                    name:"伟哥哥"，
                    age:"19"
                },
                03:{
                    name:"伟哥哥"，
                    age:"20"
                }

                //jQuery操作一定要做变量本地化
                var list = document.getElementById("list");
                for(var id in data){
                    var item = data[id];
                    var liElement = document.createElement("li");
                    //liElement.innerHTML = item.name;
                    liElement.appendChild(document.createTextNode(item.name));
                    liElement.setAttribute("data-age",item.age);
                    liElement.setAttribute("data-id",item.id);
                    list.appendChild(liElement);//变量本地化

                    //此处才将元素加到界面上
                    liElement.addEventListener("click",function(){
                        //alert(this.name);
                        //this 是当前点击的元素
                        //alert(this.getAttribute("data-age"));
                        console.log(this.dataset["age"]);
                    })
                }

            };
        </script>

Case 2:

                
•                     张三                     
                  
                
•                   李四                     
                  
                
•                   王二                   
                  
            

                 <script> var ul = document.getElementById(&#39;users&#39;); for (var i = 0; i < ul.children.length; i++) { var li = ul.children[i]; // JS 添加data属性 i.setAttribute(&#39;data-name&#39;, li.innerText); i.children[0].innerText = &#39;&#39;; or (var key in li.dataset) { li.children[0].innerText += key + &#39;:&#39; + li.dataset[key] + &#39;\n&#39;; } } </script>Case 3:

            
                <p>
                    </p>

                        
• 新闻
                        
• 八卦
                        
• 体育
                    

                    

                    

                    

                                 <script> $(function(){ //写这个是为了有一个单独作用于，避免污染 //api是应用程序编程接口 var $lis = $(&#39;.tabs>ul>li&#39;); $lis.on("click",function(){ //获取目标对象的选择器 var targetSelector = $(this).data(&#39;target&#39;); var $target = $(targetSelector); }); }); </script>             Smart form

New form type

        //repuired表示必须的，表示填写框不能为空，会有提示但是提示不能更改         text:         //只能判断中间是否有@         email:
        date:
        //拖动条，可以获得拉到的地方的数字         range: 
        search:
        tel:
        color:
        number:
             

Virtual keyboard adaptation

        手机键盘会根据不同的type类型弹出不同键盘类型
        如打开数字键盘，密码键盘，邮件键盘
        <input>
        <input>
        <input>
        <input>
        <input>

Web page

Multimedia

Audio

    多媒体的dom对象有一些新的方法可以去做播放暂停

Single data source method

默认界面：

        <audio></audio>

自定义一个：
        <audio></audio>
        <button>播放</button>
        <button>暂停</button>
        <script>
        var btn = document.getElementById("btn");
        var btn_pause = document.getElementById("btn_pause");
        var audio = document.getElementById("audio");
        btn.addEventListener("click",function(){
            //播放音频
            audio.play();
        });
        btn_pause.addEventListener("click",function(){
            // 暂停音频
            audio.pause();
        });
        </script>

Multiple data source method

        <audio>
            <source></source>
        </audio>

Video

Single data source method

<video></video>

Multiple data source method

        <video>
             不同浏览器支持格式不一样,因为版权问题
            <source></source>
            <source></source>
             当浏览器不兼容video标签，就会将他以p方式解析
             用第三方组件代替
             <object>
              <param>
              <param>
              <param>
              <param>
              <param>
              <p>
                </p>
<p>
                  </p>
<p><span>您还没有安装flash播放器,请点击<a>这里</a>安装</span></p>
                
              
            </object>
        </video>

Video player related properties

        属性      值           描述
        autoplay    autoplay    如果出现该属性，则视频在就绪后马上播放
        controls    controls    如果出现该属性，则向用户显示控件，比如播放按钮
        height      pixels      设置视频播放器的高度
        loop        loop        如果出现该属性，则当媒介文件完成播放后再次开始播放
        muted       muted       规定视频的音频输出应该被静音。【即：静音】
        poster      URL         规定视频下载时显示的图像，或者在用户点击播放按钮前显示的图像
        preload     preload     如果出现该属性，则视频在页面加载时进行加载，并预备播放
                                如果使用"autoplay"，则忽略该属性
        src         url         要播放的视频的URL
        width       pixels      设置视频播放器的宽度

Subtitles

    字幕案例：
        <video>
            <source></source>
            <track></track>
        </video>

    字幕文件内容示例：
        WEBVIT  FILE

        1
        00:00:00.000 --> 00:00:12.000 D:vertical A:start

        2
        00:00:12.000 --> 00:00:15.300
        大家好，我是伟哥哥

Canvas

2D

3D (WebGL)

SVG

Scalable Vector Graphics Scalable Vector Shape

svg

ImageSource: via AI, File-->Script-->Save document as SVG

svg can be like a tag Paste it directly to the page like that, but we prefer to load it like a picture

可以借助三个标签载入：

        <iframe></iframe>    //推荐
        <object></object>
        <embed>


学完ajax之后推荐方式：

        学习完异步请求之后，我们可以遍历所有SVG节点，把src引入进来，本身他是一个document对象，可以把它直接append到文档中。

        window.addEventListener('load',function(){
            var svgs = document.getElementByTagName('svg');
            for (var i = 0;i </embed>

Additional:

1. Sublime server plug-in installation

Do not stop serber after installation. Directly
exitsublime, otherwise sublime will crash

2. Expand the settings in the upper right corner of the Google Chrome developer tools, select show useragent shadow DOM and you can see the virtual The DOM that comes out

3.

Pseudo classObject is equivalent to inserting one after weigege, and its style can be changed

<style>
.content::after{
    content: &#39;zuishuai&#39;;
    color: #465;
}
</style>
<p>weigege</p>

4.h5 new tag

h5 The new tag may not be recognized by low-level browsers because it is too new. The unrecognized tag browser will automatically recognize it as p and load it. The tag can be generated in the following ways
Method 1: Define it yourself

Method 2: Introduce the third-party component html5shiv.js
In it, all h5 new tags are created through method 1

5. Enter the following code once in the Google console

1.
document.body (Enter)
document.body.contentEditable = true; (Enter)
Then you can edit the text directly on the page
2.
Enter directly at the connection
data:text/html, (Enter)
You can edit text directly on the page

6. Third-party multimedia player library: jwplayer

7. Specifically for mobile terminals Component used zepto?

The implemented api is basically the same as jQuery
Redundant processing and compatible codes have been cut off
It seems that it can replace jQuery

8.! important cannot support the inline style in the old version

9.Markdown

Open source project description files are written in this way
Syntax link: http://wowubuntu.com/markdown/
Use normal text to describe the syntax of rich text
Extension md, markdown
Case
h tag

HEADER1

HEADER2

HEADER3

Write the paragraph directly without adding anything in front

• Unordered list

• There are spaces in front

1. Ordered list

2. The numbers in front are all ordered lists, remember to add spaces

<br/>

SpecificEditorYou can add javascript to represent specific syntax for writing code

10.iframe
It is equivalent to digging a pit to load other pages

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