利用Vue+ElementUi实现评论功能

前言

这两天在用vue重构之前写的一个社区博客项目，之前评论的样式和效果都差强人意
在写完这个功能后，由心觉得Vue真的非常好用。

话不多说，先上效果图

代码

html代码：

<template>
    <div>
        <div v-clickoutside="hideReplyBtn" @click="inputFocus" class="my-reply">
            <el-avatar class="header-img" :size="40" :src="myHeader"></el-avatar>
            <div class="reply-info" >
                <div 
                tabindex="0" 
                contenteditable="true" 
                id="replyInput" 
                spellcheck="false" 
                placeholder="输入评论..." 
                class="reply-input" 
                @focus="showReplyBtn"  
                @input="onDivInput($event)"
                >
                </div>
            </div>
            <div class="reply-btn-box" v-show="btnShow">
                <el-button class="reply-btn" size="medium" @click="sendComment" type="primary">发表评论</el-button>
            </div>
        </div>
        <div v-for="(item,i) in comments" :key="i" class="author-title reply-father">
            <el-avatar class="header-img" :size="40" :src="item.headImg"></el-avatar>
            <div class="author-info">
                <span class="author-name">{{item.name}}</span>
                <span class="author-time">{{item.time}}</span>
            </div>
            <div class="icon-btn">
                <span @click="showReplyInput(i,item.name,item.id)"><i class="iconfont el-icon-s-comment"></i>{{item.commentNum}}</span>
                <i class="iconfont el-icon-caret-top"></i>{{item.like}}
            </div>
            <div class="talk-box">
                <p>
                    <span class="reply">{{item.comment}}</span>
                </p>
            </div>
            <div class="reply-box">
                <div v-for="(reply,j) in item.reply" :key="j" class="author-title">
                    <el-avatar class="header-img" :size="40" :src="reply.fromHeadImg"></el-avatar>
                    <div class="author-info">
                        <span class="author-name">{{reply.from}}</span>
                        <span class="author-time">{{reply.time}}</span>
                    </div>
                    <div class="icon-btn">
                        <span @click="showReplyInput(i,reply.from,reply.id)"><i class="iconfont el-icon-s-comment"></i>{{reply.commentNum}}</span>
                        <i class="iconfont el-icon-caret-top"></i>{{reply.like}}
                    </div>
                    <div class="talk-box">
                        <p>
                            <span>回复 {{reply.to}}:</span>
                            <span class="reply">{{reply.comment}}</span>
                        </p>
                    </div>
                    <div class="reply-box">

                    </div>
                </div>
            </div>
            <div  v-show="_inputShow(i)" class="my-reply my-comment-reply">
                <el-avatar class="header-img" :size="40" :src="myHeader"></el-avatar>
                <div class="reply-info" >
                    <div tabindex="0" contenteditable="true" spellcheck="false" placeholder="输入评论..."   @input="onDivInput($event)"  class="reply-input reply-comment-input"></div>
                </div>
                <div class=" reply-btn-box">
                    <el-button class="reply-btn" size="medium" @click="sendCommentReply(i,j)" type="primary">发表评论</el-button>
            </div>
        </div>
        </div>
    </div>
</template>

Js 代码如下
我把模拟的数据写在了data里面，显得js有点长。如果要更改数据的格式的话，记得也要改Html不然会出错。

<script>
const clickoutside = {
    // 初始化指令
    bind(el, binding, vnode) {
    function documentHandler(e) {
    // 这里判断点击的元素是否是本身，是本身，则返回
        if (el.contains(e.target)) {
            return false;
        }
    // 判断指令中是否绑定了函数
        if (binding.expression) {
            // 如果绑定了函数 则调用那个函数，此处binding.value就是handleClose方法
            binding.value(e);
        }
    }
    // 给当前元素绑定个私有变量，方便在unbind中可以解除事件监听
    el.vueClickOutside = documentHandler;
    document.addEventListener('click', documentHandler);
    },
    update() {},
    unbind(el, binding) {
    // 解除事件监听
    document.removeEventListener('click', el.vueClickOutside);
    delete el.vueClickOutside;
  },
};
export default {
    name:'ArticleComment',
    data(){
        return{
            btnShow: false,
            index:'0',
            replyComment:'',
            myName:'Lana Del Rey',
            myHeader:'https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg',
            myId:19870621,
            to:'',
            toId:-1,
            comments:[
                {
                    name:'Lana Del Rey',
                    id:19870621,
                    headImg:'https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg',
                    comment:'我发布一张新专辑Norman Fucking Rockwell,大家快来听啊',
                    time:'2019年9月16日 18:43',
                    commentNum:2,
                    like:15,
                    inputShow:false,
                    reply:[
                        {
                            from:'Taylor Swift',
                            fromId:19891221,
                            fromHeadImg:'https://ae01.alicdn.com/kf/H94c78935ffa64e7e977544d19ecebf06L.jpg',
                            to:'Lana Del Rey',
                            toId:19870621,
                            comment:'我很喜欢你的新专辑！！',
                            time:'2019年9月16日 18:43',
                            commentNum:1,
                            like:15,
                            inputShow:false
                        },
                        {
                            from:'Ariana Grande',
                            fromId:1123,
                            fromHeadImg:'https://ae01.alicdn.com/kf/Hf6c0b4a7428b4edf866a9fbab75568e6U.jpg',
                            to:'Lana Del Rey',
                            toId:19870621,
                            comment:'别忘记宣传我们的合作单曲啊',
                            time:'2019年9月16日 18:43',
                            commentNum:0,
                            like:5,
                            inputShow:false

                        }
                    ]
                },
                {
                    name:'Taylor Swift',
                    id:19891221,
                    headImg:'https://ae01.alicdn.com/kf/H94c78935ffa64e7e977544d19ecebf06L.jpg',
                    comment:'我发行了我的新专辑Lover',
                    time:'2019年9月16日 18:43',
                    commentNum:1,
                    like:5,
                    inputShow:false,
                    reply:[
                        {
                            from:'Lana Del Rey',
                            fromId:19870621,
                            fromHeadImg:'https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg',
                            to:'Taylor Swift',
                            toId:19891221,
                            comment:'新专辑和speak now 一样棒！',
                            time:'2019年9月16日 18:43',
                            commentNum:25,
                            like:5,
                            inputShow:false

                        }
                    ]
                },
                {
                    name:'Norman Fucking Rockwell',
                    id:20190830,
                    headImg:'https://ae01.alicdn.com/kf/Hdd856ae4c81545d2b51fa0c209f7aa28Z.jpg',
                    comment:'Plz buy Norman Fucking Rockwell on everywhere',
                    time:'2019年9月16日 18:43',
                    commentNum:0,
                    like:5,
                    inputShow:false,
                    reply:[]
                },
            ]
        }
    },
    directives: {clickoutside},
    methods: {
        inputFocus(){
            var replyInput = document.getElementById('replyInput');
            replyInput.style.padding= "8px 8px"
            replyInput.style.border ="2px solid blue"
            replyInput.focus()
        },  
        showReplyBtn(){
            this.btnShow = true
        },
        hideReplyBtn(){
            this.btnShow = false
            replyInput.style.padding= "10px"
            replyInput.style.border ="none"
        },
        showReplyInput(i,name,id){
            this.comments[this.index].inputShow = false
            this.index =i
            this.comments[i].inputShow = true
            this.to = name
            this.toId = id
        },
        _inputShow(i){
            return this.comments[i].inputShow 
        },
        sendComment(){
            if(!this.replyComment){
                 this.$message({
                    showClose: true,
                    type:'warning',
                    message:'评论不能为空'
                })
            }else{
                let a ={}
                let input =  document.getElementById('replyInput')
                let timeNow = new Date().getTime();
                let time= this.dateStr(timeNow);
                a.name= this.myName
                a.comment =this.replyComment
                a.headImg = this.myHeader
                a.time = time
                a.commentNum = 0
                a.like = 0
                this.comments.push(a)
                this.replyComment = ''
                input.innerHTML = '';

            }
        },
        sendCommentReply(i,j){
            if(!this.replyComment){
                 this.$message({
                    showClose: true,
                    type:'warning',
                    message:'评论不能为空'
                })
            }else{
                let a ={}
                let timeNow = new Date().getTime();
                let time= this.dateStr(timeNow);
                a.from= this.myName
                a.to = this.to
                a.fromHeadImg = this.myHeader
                a.comment =this.replyComment
                a.time = time
                a.commentNum = 0
                a.like = 0
                this.comments[i].reply.push(a)
                this.replyComment = ''
                document.getElementsByClassName("reply-comment-input")[i].innerHTML = ""
            }
        },
        onDivInput: function(e) {
            this.replyComment = e.target.innerHTML;
        },
        dateStr(date){
            //获取js 时间戳
            var time=new Date().getTime();
            //去掉 js 时间戳后三位，与php 时间戳保持一致
            time=parseInt((time-date)/1000);
            //存储转换值 
            var s;
            if(time<60*10){//十分钟内
                return '刚刚';
            }else if((time<60*60)&&(time>=60*10)){
                //超过十分钟少于1小时
                s = Math.floor(time/60);
                return  s+"分钟前";
            }else if((time<60*60*24)&&(time>=60*60)){ 
                //超过1小时少于24小时
                s = Math.floor(time/60/60);
                return  s+"小时前";
            }else if((time<60*60*24*30)&&(time>=60*60*24)){ 
                //超过1天少于30天内
                s = Math.floor(time/60/60/24);
                return s+"天前";
            }else{ 
                //超过30天ddd
                var date= new Date(parseInt(date));
                return date.getFullYear()+"/"+(date.getMonth()+1)+"/"+date.getDate();
            }
        }
    },    
}
</script>

css 代码

<style lang="scss" scoped>
.my-reply {
  padding: 10px;
  background-color: #fafbfc;
  .header-img {
    display: inline-block;
    vertical-align: top;
  }

  .reply-info {
    display: inline-block;
    margin-left: 5px;
    width: 90%;
    @media screen and (max-width: 1200px) {
       80%;
    }
    .reply-input {
      min-height: 20px;
      line-height: 22px;
      padding: 10px 10px;
      color: #ccc;
      background-color: #fff;
      border-radius: 5px;
      &:empty:before {
        content: attr(placeholder);
      }
      &:focus:before {
        content: none;
      }
      &:focus {
        padding: 8px 8px;
        border: 2px solid blue;
        box-shadow: none;
        outline: none;
      }
    }
  }
  .reply-btn-box {
    height: 25px;
    margin: 10px 0;
    .reply-btn {
      position: relative;
      float: right;
      margin-right: 15px;
    }
  }
}
.my-comment-reply {
  margin-left: 50px;
  .reply-input {
    width: flex;
  }
}

.author-title:not(:last-child) {
  border-bottom: 1px solid rgba(178, 186, 194, 0.3);
}

.author-title {
  padding: 10px;
  .header-img {
    display: inline-block;
    vertical-align: top;
  }
  .author-info {
    display: inline-block;
    margin-left: 5px;
    width: 60%;
    height: 40px;
    line-height: 20px;
    > span {
      display: block;
      cursor: pointer;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
    }
    .author-name {
      color: #000;
      font-size: 18px;
      font-weight: bold;
    }

    .author-time {
      font-size: 14px;
    }
  }
  .icon-btn {
    width: 30%;
    padding: 0 !important ;
    float: right;
    @media screen and (max-width: 1200px) {
       20%;
      padding: 7px;
    }
    > span {
      cursor: pointer;
    }
    .iconfont {
      margin: 0 5px;
    }
  }
  .talk-box {
    margin: 0 50px;
    > p {
      margin: 0;
    }
    .reply {
      font-size: 16px;
      color: #000;
    }
  }
  .reply-box {
    margin: 10px 0 0 50px;
    background-color: #efefef;
  }
}
</style>