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图片描述
一个p中有两个span 点击是让span的class属性变成class=" btn btn-large btn-primary "另一个 span class=" btn btn-large"[1]加粗文字: /img/bVD9xx
闭关修行中......
第一个span标签 第二个span标签
$("#p span").each(function(i){ if(i==0){ $("p span").on("click",function(){ $(this).addClass("btn btn-large btn-primary"); }) }else{ $("p span").on("click",function(){ $(this).addClass("btn btn-large"); }) } });
$(function() { $("span").on("click", function() { $(this).addClass("btn-primary").siblings().removeClass("btn-primary"); }); });
来N个span都没问题
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
HTML
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HTML
JS
来N个span都没问题