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CSS Listing Styles

一、什么是CSS Listing Styles

CSS Listing Styles指的是一种使用CSS样式来美化列表的技术,可以提升列表的可读性和可视性。通常,用CSS Listing Styles美化的列表包括有序列表和无序列表。有序列表使用数字或字母来标记每个列表项,而无序列表使用符号来标记。

通过使用CSS Listing Styles,我们可以改变列表项的背景颜色、字体样式、间距等属性,以增强列表的可读性和美观度。

二、如何使用CSS Listing Styles

要使用CSS Listing Styles,我们需要定义一个样式,在该样式中设置所需的属性。常用的属性包括:

  
    /* 对于无序列表 */
    ul {
        list-style-type: none; /* 隐藏默认的符号 */
    }
    li {
        padding: 10px;
        margin: 10px 0;
        background-color: #f5f5f5;
        border-radius: 5px;
    }

    /* 对于有序列表 */
    ol {
        list-style-type: decimal; /* 将标记设置为数字形式 */
    }
    li {
        padding: 10px;
        margin: 10px 0;
    }
  

在上面的样式中,我们为无序列表设置了背景颜色、内边距、外边距和边框半径,以及去掉了默认的符号。对于有序列表,我们将标记设置为数字形式,以便进行编号。

三、常见的CSS Listing Styles

1. 箭头列表样式

箭头列表样式是常见的无序列表样式之一,将列表项的符号替换为箭头图标。

  
    ul {
        list-style-type: none; /* 去掉默认的符号 */
    }
    li {
        padding-left: 30px; /* 预留出箭头图标的位置 */
        position: relative; /* 将li设置为相对定位 */
    }
    li::before {
        content: ""; /* 不能添加内容 */
        display: inline-block; /* 将伪元素指定为内联块元素 */
        width: 10px; /* 指定宽度 */
        height: 10px; /* 指定高度 */
        background-color: black; /* 设置背景颜色 */
        position: absolute; /* 将伪元素设置为绝对定位 */
        left: 0; /* 相对于li的左侧 */
        top: 10px; /* 相对于li的上侧 */
        transform: rotate(-45deg); /* 旋转45度 */
    }
  

2. 圆点列表样式

圆点列表样式是另一种常见的无序列表样式,将列表项的符号替换为实心圆点。

  
    ul {
        list-style-type: none; /* 去掉默认的符号 */
    }
    li {
        padding-left: 30px; /* 预留出圆点的位置 */
        position: relative; /* 将li设置为相对定位 */
    }
    li::before {
        content: ""; /* 不能添加内容 */
        display: inline-block; /* 将伪元素指定为内联块元素 */
        width: 10px; /* 指定宽度 */
        height: 10px; /* 指定高度 */
        background-color: black; /* 设置背景颜色 */
        border-radius: 50%; /* 将形状设置为圆形 */
        position: absolute; /* 将伪元素设置为绝对定位 */
        left: 0; /* 相对于li的左侧 */
        top: 10px; /* 相对于li的上侧 */
    }
  

3. 项目编号样式

项目编号样式是有序列表样式之一,将每个列表项都分配一个编号,并将编号放在列表项旁边。

  
    ol {
        counter-reset: item; /* 重置计数器 */
        list-style-type: none; /* 去掉默认的标记 */
    }
    li {
        counter-increment: item; /* 计数器自增 */
        margin-bottom: 10px; /* 设置间距 */
    }
    li::before {
        content: counter(item) "."; /* 使用计数器并添加编号 */
        display: inline-block; /* 将伪元素指定为内联块元素 */
        width: 1em; /* 设置宽度 */
        margin-right: 0.5em; /* 设置间距 */
    }
  

四、总结

CSS Listing Styles是用于美化列表的技术,通常应用于有序列表和无序列表。通过使用CSS Listing Styles,我们可以增强列表的可读性和美观度。常见的CSS Listing Styles包括箭头列表样式、圆点列表样式和项目编号样式等。

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Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:481) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:401) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:370) at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104) at freemarker.core.DollarVariable.accept(DollarVariable.java:63) at freemarker.core.Environment.visit(Environment.java:371) at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:321) at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271) at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:244) at freemarker.core.Environment.visitIteratorBlock(Environment.java:645) at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:108) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:94) at freemarker.core.Environment.visit(Environment.java:335) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.process(Environment.java:314) at freemarker.template.Template.process(Template.java:383) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:332) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:266) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:220) at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:181) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1431) at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1167) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1106) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at com.software.filter.HttpSpiderIdentifyFilter.doFilter(HttpSpiderIdentifyFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at java.base/java.lang.VirtualThread.run(VirtualThread.java:309)