利用Vue+ElementUi实现评论功能_Vue.js

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，所以仿照掘金重写了一个评论功能（但不是完全照搬模仿）

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

评论效果图

效果动图

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="stylus" 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) {
            width 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,.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){
            width 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>