Basic css syntax and use of selectors_html/css_WEB-ITnose
css syntax
selector{
property:value
}
Example: h1{color:red; font-size: 14px}
After the attribute is greater than 1, separate the attributes with semicolons
If the value is greater than 1 word, you need to add quotation marks
p{font- family: "sans serif";}
Selector grouping:
h1,h2,h3,h4,h5,h6{color:red;}
Inherited:
body{
color:green;
}
css- Derived selectors
Defines styles by relying on the context of the element in its position
css-id selector
The id selector can be specified for HTML elements marked with an id Specific styles
id selectors are defined with "#"
id selectors are often used to create derived selectors
css-class selectors
The class selector is shown with a dot
class can also be used as a derived selector
css-attribute selector
pair Style HTML elements with specified attributes
Attribute and value selectors
body{ color:red;}h1,h2,p{ color: bisque;}/*派生选择器*/li strong{ color: black;}strong{ color: blue;}/*id选择器*/#divId{ color: brown;}/*id选择器和派生选择器一起作用*/#pid a{ color: crimson;}/*类选择器*/.pclass{ color: chartreuse;}/*类选择器派生选择器一起作用*/.divclass a{ font-size: 100px; color: black;}/*属性选择器*/[title]{ color: chartreuse; font-size: 50px;}/*属性和值选择器*/[title=te]{ color: chocolate; font-size: 10px;}<!DOCTYPE html><html><head lang="en"> <meta charset="UTF-8"> <title></title> <link href="myCss.css" type="text/css" rel="stylesheet"></head><body><p>aaaaa</p><h1>123</h1><a>aaaaaaa</a><!--派生选择器--><p><strong>p标签hello css</strong></p><ul> <li><strong>li标签hello css</strong></li></ul><!--id选择器和派生选择器一起作用--><p id="pid">hello css <a href="http://www.baidu.com">baidu</a></p><!--id选择器的使用--><div id="divId"> 这是一个div</div><!--类选择器的使用--><p class="pclass">这是一个class效果</p><div class="divclass"> Hello Div <a href="http://www.baidu.com">baidu</a></div><!--属性选择器的使用--><p title="t">属性选择器的使用</p><!--属性和值选择器的使用--><p title="te">属性和值选择器的使用</p></body></html>
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