css基本概念(语法和border调试法)
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">css(层叠样式表):<span style="color: black;">日前</span><span style="color: black;">运用</span>最广泛的版本为css2.1版本。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">层叠样式表:样式层叠,<span style="color: black;">选取</span>器层叠,文件层叠(使css更加灵活)</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">css语法:</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">语法1</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;">选取</span>器{
属性名;属性值;
/* 注释 */
}</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">重视</span>点:</p>所有的符号都应该是英文的。<span style="color: black;">必定</span>要严格的区分<span style="color: black;">体积</span>写。任何问题写错了,都不会报错。(调试大法,常用的有border调试法。)<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">语法2 at语法</p>
<div style="color: black; text-align: left; margin-bottom: 10px;">@charest "UTF-8";
@import url (2.css);
@media (min-width:100px) and (max-width:200px){
语法一
} ;</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">重视</span>点:</p>charest "UTF-8";声明字符编码。<span style="color: black;">必要</span>放在<span style="color: black;">第1</span>行import url (2.css) 告诉css引用一个<span style="color: black;">外边</span>样式第三句为媒介<span style="color: black;">查找</span>。两个@之间<span style="color: black;">必定</span>要用;隔离。<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">语法调试</p>W3c css validator (不<span style="color: black;">意见</span><span style="color: black;">运用</span>)vscode 颜色提醒webstorm 颜色提醒(<span style="color: black;">可靠</span>)<span style="color: black;">运用</span><span style="color: black;">研发</span>者<span style="color: black;">工具</span>border调试大法<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">border调试大法</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">过程</span>:</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">可疑</span>哪一个元素有问题就给这个元素加border。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">border效果未<span style="color: black;">显现</span>,则<span style="color: black;">暗示</span>这个<span style="color: black;">选取</span>器<span style="color: black;">或</span>语法有错误。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">border<span style="color: black;">显现</span>,则确认边界<span style="color: black;">是不是</span>符合预期。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">代码以及展示模式:</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic2.zhimg.com/80/v2-addfa56556b59b891909c443ae07c421_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>图1:错误的代码<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic4.zhimg.com/80/v2-6901ea8a7f94f1d3565c53c7dae66183_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>图2:border调试大法测试<span style="color: black;">选取</span>器<span style="color: black;">是不是</span>错误,<span style="color: black;">显现</span>则<span style="color: black;">选取</span>器<span style="color: black;">没</span>错。<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic3.zhimg.com/80/v2-3e10858d5bdd9f2f6cf29294d7bbe30e_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>图3:border调试法测试字体颜色未<span style="color: black;">显现</span>,则<span style="color: black;">表率</span>字体颜色<span style="color: black;">显现</span>错误。<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic2.zhimg.com/80/v2-564511d99e01512e72c8f34e63acaca1_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>图4:调试成功
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