jquery与vue实现多级评论和回复的功能代码对比
jquery是dom操作的辅助工具,随着html5的发布,jquery逐渐也退出历史的舞台,我接替jquery的就是虚拟dom插件,而虚拟dom插件中属vue比较流行,今天我们来通过用jquery和vue分别写一个多级评论和回复的页面效果,看看jquey和vue的真实差别到底在哪?
一、评论数据源
评论数据源我们采用的嵌套式数据结构,顶级评论的pid为0,子评论或回复的pid为上一级的id,每个评论都有子评论replyComments数组,如果没有就是空数组,有的话就是一个评论数组,数据源如下表,可以在mysql中创建好数据结构,然后取出来的时候通过递归形成下面的数据结构。
var comments= [{ "id": 1, "pid": 0, "nickname": "张三", "content": "你们好", "createTime": "2020-04-12T06:32:20.613+0000", "replyComments": [{ "id": 2, "pid": 1, "nickname": "李四", "content": "你好", "createTime": "2020-04-12T06:32:31.699+0000", "replyComments": [] }] }, { "id": 3, "pid": 0, "nickname": "王五", "content": "猪吗?", "createTime": "2020-04-12T06:34:37.146+0000", "replyComments": [{ "id": 4, "pid": 3, "nickname": "赵六", "content": "??", "createTime": "2020-04-12T07:03:47.873+0000", "replyComments": [{ "id": 5, "pid": 4, "nickname": "老李", "content": "你们在耍啥", "createTime": "2020-04-12T07:03:47.873+0000", "replyComments": [] }] }] }, ];
二、评论html
这是一个嵌套式的多楼层评论html效果,不管通过jquery还是vue,最终的效果都是这样的。<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum=1.0,minimum=1.0,user-scalable=0" /> <style> .comment-box{ padding: 5px 10px; border: 1px solid grey; margin:5px; } .reply{ color: red; font-weight: bold; } </style> </head> <body> <div id="comment"><div class="comment-box"><span>张三说</span> <span>你们好</span> <span toid="1" touser="张三" class="reply">回复</span><div class="comment-box"><span>李四回复说</span> <span>你好</span> <span toid="2" touser="李四" class="reply">回复</span></div></div><div class="comment-box"><span>王五说</span> <span>猪吗?</span> <span toid="3" touser="王五" class="reply">回复</span><div class="comment-box"><span>赵六回复说</span> <span>??</span> <span toid="4" touser="赵六" class="reply">回复</span><div class="comment-box"><span>老李回复说</span> <span>你们在耍啥</span> <span toid="5" touser="老李" class="reply">回复</span></div></div></div></div> </body> </html>
三、jquery实现多级评论
jquery主要通过each对数组进行循环,然后进行递归输出一个总的html字符串,最后再插入到dom节点中,完整代码如下:
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum=1.0,minimum=1.0,user-scalable=0" /> <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/jquery.17.js"></script> <script type="text/javascript"> $(function() { var comments= [{ "id": 1, "pid": 0, "nickname": "张三", "content": "你们好", "createTime": "2020-04-12T06:32:20.613+0000", "replyComments": [{ "id": 2, "pid": 1, "nickname": "李四", "content": "你好", "createTime": "2020-04-12T06:32:31.699+0000", "replyComments": [] }] }, { "id": 3, "pid": 0, "nickname": "王五", "content": "猪吗?", "createTime": "2020-04-12T06:34:37.146+0000", "replyComments": [{ "id": 4, "pid": 3, "nickname": "赵六", "content": "??", "createTime": "2020-04-12T07:03:47.873+0000", "replyComments": [{ "id": 5, "pid": 4, "nickname": "老李", "content": "你们在耍啥", "createTime": "2020-04-12T07:03:47.873+0000", "replyComments": [] }] }] }, ]; $("#comment").html(diGui(comments)) $(".reply").click(function(){ var tonickname=$(this).attr("touser"); var toid=$(this).attr("toid"); $("#toid").val(toid); $("#replycontent").attr("placeholder","回复"+tonickname); }); }); function diGui(children_list){ var html = ""; $.each(children_list,function (ck,cv) { var b = '<div class="comment-box">'; if(cv.pid>0){ b+= "<span>"+cv.nickname+'回复说</span> '; }else{ b+= "<span>"+cv.nickname+'说</span> '; } b+= "<span>"+cv.content + "</span> <span toid='"+cv.id+"' touser='"+cv.nickname+"' class='reply'>回复</span>"; b += diGui(cv.replyComments); b += "</div>"; html += b; }); return html; } </script> <style> .comment-box{ padding: 5px 10px; border: 1px solid grey; margin:5px; } .reply{ color: red; font-weight: bold; } </style> </head> <body> <div id="comment"> </div> <form><input placeholder="" id="replycontent" /> <input type="hidden" id="toid" /><input type="button" value="回复" /></form> </body> </html>
四、vue实现多级评论
vue只要自定义个reply组件,然后通过引入组件直接输出即可完成上面的效果,完整代码如下:
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum=1.0,minimum=1.0,user-scalable=0" /> <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/vue@2.6.1-dev.js"></script> <style> .comment-box{ padding: 5px 10px; border: 1px solid grey; margin:5px; } .reply{ color: red; font-weight: bold; } </style> </head> <body> <div id="app"> <div id="comment"> <Reply :commentdata="comments" v-on:replyit="replyit" ></Reply> </div> <form><input :placeholder="touser" id="replycontent" /> <input type="hidden" id="toid" :value="toid" /><input type="button" value="回复" /></form> </div> <script type="text/javascript"> Vue.component('Reply',{ template: '<div><div class="comment-box" v-for="item in commentdata"><span>{{item.nickname}}说</span> <span>{{item.content}}</span> <span @click="replyit(item.id,item.nickname)" class="reply">回复</span><Reply v-bind="$attrs" v-on="$listeners" v-if="item.replyComments" :commentdata="item.replyComments" ></Reply></div></div>', props: ['commentdata'], data: function () { return { }; }, mounted: function () { }, methods: { replyit(toid,touser){ this.$emit('replyit', [toid,touser]); } } }); new Vue({ el: '#app', components: { // 不需要注册也能使用 }, mounted: function () { console.log("vue挂载完成"); }, data: { touser:"", toid:"", comments: [{ "id": 1, "pid": 0, "nickname": "张三", "content": "你们好", "createTime": "2020-04-12T06:32:20.613+0000", "replyComments": [{ "id": 2, "pid": 1, "nickname": "李四", "content": "你好", "createTime": "2020-04-12T06:32:31.699+0000", "replyComments": [] }] }, { "id": 3, "pid": 0, "nickname": "王五", "content": "猪吗?", "createTime": "2020-04-12T06:34:37.146+0000", "replyComments": [{ "id": 4, "pid": 3, "nickname": "赵六", "content": "??", "createTime": "2020-04-12T07:03:47.873+0000", "replyComments": [{ "id": 5, "pid": 4, "nickname": "老李", "content": "你们在耍啥", "createTime": "2020-04-12T07:03:47.873+0000", "replyComments": [] }] }] }, ] }, methods: { replyit(data){ this.touser="回复"+data[1]; this.toid=data[0]; } } }); </script> </body> </html>
性能对比总结
两种方式都实现了多级评论和回复,但是我们从性能上来对比一下:
我们发现jquery的执行脚本时间更短,这是由于jquery直接操作dom树,二vue还是经过复杂计算后再生成dom树,这个数据量太小,看不出太大差异,在数据量大和交互比较频繁的场景下,vue的性能优势就会凸显出来。
那么代码写法上,jquery比较直接,直接操作dom树,而vue通过组件化方式编写,使用更方便,以上仅代表个人观点,大家觉得呢?
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