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CSS在HTML中的缩进代码

一、什么是CSS缩进?

CSS缩进是指在编写CSS样式时,为了让代码更加清晰易读,采用缩进的方式对代码进行排版,使各个选择器、属性、值等之间的关系更加明显的方法。CSS缩进可以增加代码的可读性,提高代码的可维护性。

二、为什么要在HTML中使用CSS缩进?

在HTML中使用CSS缩进可以使HTML页面看起来更加整洁美观。

通过在HTML中使用CSS缩进可以更加清晰地显示出DOM树结构,使代码更加易读、易理解。同时,使用CSS缩进可以使HTML代码更加规范化,便于后期维护。而且,当需要修改或增加CSS样式时,使用CSS缩进的代码可以让开发人员更加快速地找到所需的代码块,提高了工作效率。

三、如何在HTML中进行CSS缩进?

在HTML中使用CSS缩进,可以通过以下两种方式:

1、内联样式:在html标签上增加style属性,并将相应的CSS样式作为属性值。

    <div style="  
           margin: 0 auto;  
           width: 80%;  
           height: 200px;  
           background-color: #f0f0f0;  
           border-radius: 5px;  
    "></div>  

2、样式表:在head标签中使用<style>标签或者外部样式表文件方式定义样式。

    <head>  
        <style type="text/css">  
            div {  
                margin: 0 auto;  
                width: 80%;  
                height: 200px;  
                background-color: #f0f0f0;  
                border-radius: 5px;  
            }  
        </style>  
    </head>  

四、CSS缩进的注意事项

1、注意统一缩进方式。可以使用空格或者缩进符,但必须统一。

2、注意CSS属性和值之间的空格。每个CSS属性和值之间都应有一个空格,例如:margin: 0 auto;

3、注意代码的格式。在写代码时要注意空格、换行等格式问题,使代码看起来更加工整。

4、注意代码的注释。对代码块进行必要的注释,便于维护。

5、在写CSS缩进时,一定要注意代码的可读性,尽量使代码排版整洁,让代码排版像一个艺术品。

五、总结

在HTML中使用CSS缩进不仅可以提高代码可读性和可维护性,而且可以使HTML页面看起来更加整洁美观。在编写CSS缩进时,需要注意缩进方式、属性值之间的空格、代码格式、代码注释等,以便更好地进行后期维护。同时,代码的可读性和工整度也是衡量一个优秀工程师水平的重要标准。

CSS在HTML中的缩进代码

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when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${item.id} [in template "article/detail/index.ftl" at line 48, column 106] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:481) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:401) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:370) at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104) at freemarker.core.DollarVariable.accept(DollarVariable.java:63) at freemarker.core.Environment.visit(Environment.java:371) at freemarker.core.IteratorBlock$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)