说在前面:
嗯...博主现在是大一,前段时间犯脑癌想开一个技术博,记录一下学习过程,也是这么做的。
为什么要学前端呢?无非就是为了走在发家致富,迎娶白富美的康庄大道上。那几周来对前端开发已经入门了,(鼓掌,鼓掌)非常有意思。但还是感觉道阻且长。不懂的东西越来越多......不过还好,有好多人帮我呀,ありがとう。
html+css+js,入门很容易。读过网页设计的书也感觉OK。(捂脸,折腾小一个月还是有战果的),希望懒癌远离我,让我坚持把博客写下去。
从这周开始对学过的HTML5和CSS,开始梳理一下知识点(我觉得重要的标签,今天先写一部分)。
头:
标签:定义在
标签中。用于定义网页的信息。下面是一些总结:
<span style="color: #008080;"> 1</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">charset</span><span style="color: #0000ff;">="utf-8"</span> <span style="color: #0000ff;">/></span> <span style="color: #008080;"> 2</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">页面编码信息</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 3</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="refresh"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="5"</span><span style="color: #ff0000;">; url</span><span style="color: #0000ff;">="www.baidu.com"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;"> 4</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">url被省略时,为刷新本页面</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 5</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="expires"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="Sunday 26 October 2016 01:00 GMT"</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 6</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">设置网页缓存过期时间</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 7</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="cache-control"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="no-cache"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;"> 8</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="pragma"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="no-cache"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;"> 9</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">禁止缓存</span><span style="color: #0000ff;">></span> <span style="color: #008080;">10</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="set-cookie"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="Sunday 26 October 2016 01:00 GMT"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;">11</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">删除cookie</span><span style="color: #0000ff;">></span> <span style="color: #008080;">12</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="window-target"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="_top"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;">13</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">打开新窗口,top代表打开一个独立页面</span><span style="color: #0000ff;">></span> <span style="color: #008080;">14</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="enter-equiv"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="revealtrans(duration=3,transition=12)"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;">15</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">网页过度效果 用css和javascript代替</span><span style="color: #0000ff;">></span> <span style="color: #008080;">16</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">name</span><span style="color: #0000ff;">="keyword"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="网页设计"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;">17</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">帮搜索引擎,有的搜索引擎会限制关键字,之间用逗号隔开</span><span style="color: #0000ff;">></span> <span style="color: #008080;">18</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">name</span><span style="color: #0000ff;">="description"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="学习网页设计的网站"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;">19</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">设置页面描述</span><span style="color: #0000ff;">></span> <span style="color: #008080;">20</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">name</span><span style="color: #0000ff;">="generator"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="Adobe Dreamweaver CS3"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;">21</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">设置编辑工具</span><span style="color: #0000ff;">></span> <span style="color: #008080;">22</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">name</span><span style="color: #0000ff;">="author"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="jingsen_liu"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;">23</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">设置作者</span><span style="color: #0000ff;">></span> <span style="color: #008080;">24</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">name</span><span style="color: #0000ff;">="robots"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="all"</span><span style="color: #0000ff;">/></span> <span style="color: #008080;">25</span> <span style="color: #0000ff;"><span style="color: #ff00ff;">限制搜索方式。。。</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
页面标签:用于网页文字排版:
<span style="color: #0000ff;"><span style="color: #ff00ff;">排版标签</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #ff00ff;">页面注释</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>段落标签<span style="color: #0000ff;"></span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span> <span style="color: #0000ff;"><span style="color: #ff00ff;">换行标签</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">hr </span><span style="color: #ff0000;">width</span><span style="color: #0000ff;">="100"</span><span style="color: #ff0000;"> size</span><span style="color: #0000ff;">="100"</span><span style="color: #ff0000;"> color</span><span style="color: #0000ff;">="#9999ff"</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #ff00ff;">插入一条水平线,设置水平线的宽度和长度,颜色</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">hr </span><span style="color: #ff0000;">align</span><span style="color: #0000ff;">="center"</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #ff00ff;">水平线对齐方式,包括center,left,right,默认为center</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">hr </span><span style="color: #ff0000;">noshade</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #ff00ff;">去除水平线阴影</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">center</span><span style="color: #0000ff;">></span>居中标签<span style="color: #0000ff;"></span><span style="color: #800000;">center</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">pre</span><span style="color: #0000ff;">></span>文字<span style="color: #0000ff;"></span><span style="color: #800000;">pre</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #ff00ff;">预设标签,文字按原文档格式显示</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">nobr</span><span style="color: #0000ff;">></span>不折行<span style="color: #0000ff;"></span><span style="color: #800000;">nobr</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #ff00ff;">标签内的文字不会自动换行</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">blockquote</span><span style="color: #0000ff;">></span>向右缩进<span style="color: #0000ff;"></span><span style="color: #800000;">blockquote</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>层标签<span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">><br><br></span> <span style="color: #0000ff;"><span style="color: #ff00ff;">页面文字</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">h1</span><span style="color: #0000ff;">></span>标题格式<span style="color: #0000ff;"></span><span style="color: #800000;">h1</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #ff00ff;">段落标签</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">font </span><span style="color: #ff0000;">face</span><span style="color: #0000ff;">="宋体,隶书"</span><span style="color: #ff0000;"> color</span><span style="color: #0000ff;">="blue"</span><span style="color: #ff0000;"> size</span><span style="color: #0000ff;">="4"</span><span style="color: #0000ff;">></span>文字<span style="color: #0000ff;"></span><span style="color: #800000;">font</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #ff00ff;">设置不同的文字字体,h5中用span代替 </span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">em</span><span style="color: #0000ff;">></span>斜体字<span style="color: #0000ff;"></span><span style="color: #800000;">em</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">strong</span><span style="color: #0000ff;">></span>粗体字<span style="color: #0000ff;"></span><span style="color: #800000;">strong</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">u</span><span style="color: #0000ff;">></span>带下滑线文字<span style="color: #0000ff;"></span><span style="color: #800000;">u</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">strike</span><span style="color: #0000ff;">></span>删除线文字<span style="color: #0000ff;"></span><span style="color: #800000;">strike</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">s</span><span style="color: #0000ff;">></span>删除线文字<span style="color: #0000ff;"></span><span style="color: #800000;">s</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">sub</span><span style="color: #0000ff;">></span>下标<span style="color: #0000ff;"></span><span style="color: #800000;">sub</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">sup</span><span style="color: #0000ff;">></span>上标<span style="color: #0000ff;"></span><span style="color: #800000;">sup</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">code</span><span style="color: #0000ff;">></span>等宽标签,多用于英语<span style="color: #0000ff;"></span><span style="color: #800000;">code</span><span style="color: #0000ff;">></span> <span style="color: #ff0000;"> </span> <span style="color: #0000ff;"><span style="color: #ff00ff;">空格</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">ruby</span><span style="color: #0000ff;">></span>被标注文字<span style="color: #0000ff;"><span style="color: #800000;">rt</span><span style="color: #0000ff;">></span>标注文字<span style="color: #0000ff;"></span><span style="color: #800000;">rt</span><span style="color: #0000ff;">></span><span style="color: #800000;">ruby</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #ff00ff;">文字标注</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">var</span><span style="color: #0000ff;">></span>x<span style="color: #0000ff;"></span><span style="color: #800000;">var</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #ff00ff;">变量声明</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
音频文件为什么不响?
这周处理的一个技术问题是:我引入HTML文件的音频文件不响。下面的代码没有对播放器的格式进行太多设置(代码是正确的),毕竟没有学javascrit呢,现在只能用CSS改改播放器界面大小。
<span style="color: #008080;"> 1</span> <span style="color: #0000ff;"><span style="color: #800000;">html</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 2</span> <span style="color: #0000ff;"><span style="color: #800000;">head </span><span style="color: #ff0000;">lang</span><span style="color: #0000ff;">="en"</span> <span style="color: #0000ff;">></span> <span style="color: #008080;"> 3</span> <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">charset</span><span style="color: #0000ff;">="utf-8"</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 4</span> <span style="color: #0000ff;"><span style="color: #800000;">title</span><span style="color: #0000ff;">></span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 5</span> <span style="color: #0000ff;"></span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 6</span> <span style="color: #0000ff;"><span style="color: #800000;">body</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 7</span> <span style="color: #0000ff;"><span style="color: #800000;">audio </span><span style="color: #ff0000;">src</span><span style="color: #0000ff;">="#"</span><span style="color: #0000ff;">></span>audio player not available.<span style="color: #0000ff;"></span><span style="color: #800000;">audio</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 8</span> <span style="color: #0000ff;"><span style="color: #800000;">audio </span><span style="color: #ff0000;">controls</span><span style="color: #0000ff;">="controls"</span><span style="color: #ff0000;"> autoplay</span><span style="color: #0000ff;">="autoplay"</span><span style="color: #ff0000;"> loop</span><span style="color: #0000ff;">="loop"</span><span style="color: #0000ff;">><span style="color: #800000;">source </span><span style="color: #ff0000;">src</span><span style="color: #0000ff;">="1.mp3"</span><span style="color: #ff0000;"> type</span><span style="color: #0000ff;">="audio/mp3"</span><span style="color: #0000ff;">></span><span style="color: #800000;">audio</span><span style="color: #0000ff;">></span> <span style="color: #008080;"> 9</span> <span style="color: #0000ff;"></span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span> <span style="color: #008080;">10</span> <span style="color: #0000ff;"></span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span>
原因:编译器不识别我引入的音频文件的格式,要在编译器里确定音频文件的格式为.mp3。

The future of HTML will develop in a more semantic, functional and modular direction. 1) Semanticization will make the tag describe the content more clearly, improving SEO and barrier-free access. 2) Functionalization will introduce new elements and attributes to meet user needs. 3) Modularity will support component development and improve code reusability.

HTMLattributesarecrucialinwebdevelopmentforcontrollingbehavior,appearance,andfunctionality.Theyenhanceinteractivity,accessibility,andSEO.Forexample,thesrcattributeintagsimpactsSEO,whileonclickintagsaddsinteractivity.Touseattributeseffectively:1)Usese

The alt attribute is an important part of the tag in HTML and is used to provide alternative text for images. 1. When the image cannot be loaded, the text in the alt attribute will be displayed to improve the user experience. 2. Screen readers use the alt attribute to help visually impaired users understand the content of the picture. 3. Search engines index text in the alt attribute to improve the SEO ranking of web pages.

The roles of HTML, CSS and JavaScript in web development are: 1. HTML is used to build web page structure; 2. CSS is used to beautify the appearance of web pages; 3. JavaScript is used to achieve dynamic interaction. Through tags, styles and scripts, these three together build the core functions of modern web pages.

Setting the lang attributes of a tag is a key step in optimizing web accessibility and SEO. 1) Set the lang attribute in the tag, such as. 2) In multilingual content, set lang attributes for different language parts, such as. 3) Use language codes that comply with ISO639-1 standards, such as "en", "fr", "zh", etc. Correctly setting the lang attribute can improve the accessibility of web pages and search engine rankings.

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.

HTML is used to build websites with clear structure. 1) Use tags such as, and define the website structure. 2) Examples show the structure of blogs and e-commerce websites. 3) Avoid common mistakes such as incorrect label nesting. 4) Optimize performance by reducing HTTP requests and using semantic tags.


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