使用vue，来写个时间轴

功能

1.选择时间，获取对应数据，显示时间轴和时间点
2.时间点hover显示对应时间
3.整点时间显示
4.点击时间轴，选择对应的时间点
5.点击时间点，选择对应的时间点
6.拖动点，选择对应的时间点
7.限制拖动，及点击位置

效果图

组件代码

1.框架：vue+axios
2.日期组件：Ant Design of Vue(也可以自己修改成其他日期组件)
3.日期格式化：moment

安装: 
npm i moment --save-dev
---------------------------------------
main.js引入:
//引入moment
import moment from 'moment'
import 'moment/locale/zh-cn'//中文
Vue.prototype.$moment = moment
---------------------------------------
vue文件中:
let createDate =this.$moment(value).format('YYYY/MM/DD');

4.数据返回格式

tips:数据返回为时间戳秒钟算，而不是毫秒，所以有些地方需要*1000计算

<template>
  <div class="time_con">
    <span>选择显示区间：</span>
    <a-date-picker
      v-model="startValue"
      format="YYYY-MM-DD"
      placeholder="开始时间"
      @openChange="handleStartOpenChange"
      :disabled-date="disabledStartDate"
      @change="changePicker"
      size="large"
    />
    <a-date-picker
      v-model="endValue"
      format="YYYY-MM-DD"
      placeholder="结束时间"
      :open="endOpen"
      @openChange="handleEndOpenChange"
      :disabled-date="disabledEndDate"
      @change="changePicker"
      size="large"
    />
    
    <div class="line_time" v-show="showLine">
      <div class="all_line" @mousedown.stop="lineMouseDown">
      <!-- <div class="all_line"> -->
        <div class="line" ref="allLineTime">
          <!-- 可以滑动的线 -->
          <div class="can_line" ref="canLine" @mousedown.stop="canLineMouseDown"></div>
          <!-- 参考点 -->
          <div class=" reference" v-for="(dateTip,dt) in dateTips" :key="'tips-'+dt" :style="setLeft(dateTip)">
            <em v-text="formatter(dateTip,1)" ></em>
          </div>
          <!-- 备份点 -->
          <div class="dot dot_all" v-for="(incre,i) in incre_dates" :key="i" :style="setLeft(incre)" @mousedown.stop="clickDot(incre)">
            <em v-text="formatter(incre)" ></em>
          </div>
          <!-- 可滑动点 -->
          <div class="dot sel_dot" ref="selDot" @mousedown.stop="dragDown">
            <em>{{selTime}}<i></i></em>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {getBackupTimeline} from "@/plugins/axios";
export default {
  name: "TimeLine",
  data() {
    return {
      startValue: this.$moment().format("YYYY-MM-DD"),//开始时间---时间选择
      endValue: this.$moment().format("YYYY-MM-DD"),//结束时间---时间选择

      endOpen: false,
      fullDate:null,//最初时间（最开始有数据的时候）
      binlogDate:null,//binlog 结束时间
      selTime:null,//选中时间

      start_date:null,//开始时间戳
      end_date:null,//结束时间戳
      timeline:null,//选中时间戳
      incre_dates:[],//备份点数组
      allIncre:[],//备份点和binlog
      showLine:false,//是否显示时间轴
      dateTips:[],//0点，提示时间点数组
    };
  },
  created(){
    let today = new Date();
    let forToday = this.$moment(today).subtract(7, 'd');//获取七天前的日期
    this.startValue = this.$moment(forToday).startOf('day').format("YYYY-MM-DD");//默认设置七天前的0点为开始时间
    this.endValue = this.$moment(today).endOf('day').format("YYYY-MM-DD");//默认设置今天为结束时间
    this.getBackupTimeline(1);//参数1表示第一次执行
  },
  mounted() {

  },
  methods: {
    //时间显示格式
    formatter(value,day) {   
      if(day)return `${this.$moment(value*1000).format('YYYY/MM/DD')}`;
      return `${this.$moment(value*1000).format('YYYY/MM/DD HH:mm:ss')}`;
    },
    //开始时间---范围
    disabledStartDate(startValue) {
      let today = new Date();
      if(this.endValue){
        return startValue.format("X")*1 > this.$moment(this.endValue).endOf('day').format("X")*1 || startValue.endOf('day').format("X")*1 < this.fullDate*1;
      }else{
        return startValue.format("X")*1 > this.$moment(today).endOf('day').format("X")*1 || startValue.format("X")*1 < this.fullDate*1;  
      }
    },
    //结束时间---范围
    disabledEndDate(endValue) {
      const startValue = this.startValue;
      let today = new Date();
      if(startValue){
        let eDate = this.$moment(startValue).add(7, 'd');
        return endValue.format("X")*1 > eDate.format("X")*1 || endValue.format("X")*1 < this.$moment(startValue).startOf('day').format("X")*1  || endValue.format("X")*1 > this.$moment(today).format("X")*1;
      }else{
        return endValue.format("X")*1 < this.fullDate || endValue.format("X")*1 > this.$moment(today).format("X")*1; 
      }
    },
    handleStartOpenChange(open) {
      if (!open) {
        this.endOpen = true;
      }
    },
    handleEndOpenChange(open) {
      this.endOpen = open;
    },
    //时间选择---修改时间
    changePicker(){
      if(this.startValue && this.endValue){
        this.getBackupTimeline();
      }
    },
    //获取时间轴数据
    getBackupTimeline(n){
      if(!n)this.showLine = true;//首次执行，不显示时间轴，只用于获取fullDate和binlogDate
        
      this.$parent.showLine = false;
      this.start_date = this.$moment(this.startValue).startOf('day').format("X")*1;
      this.end_date = this.$moment(this.endValue).endOf('day').format("X")*1;
      //请求参数
      let params={
        bak_db_id:this.$route.query.bak_db_id,
        start_date:this.start_date,
        end_date:this.end_date,
      }
      getBackupTimeline(params).then(r=>{
        if(r.data.status==2000){//请求成功
          let dt = r.data.data;

          this.fullDate = dt.full_date;
          this.binlogDate = dt.binlog_date; 

          if(n){//首次执行，获取可选择日期
            let today = new Date();
            let forToday = this.$moment(today).subtract(7, 'd');
            if(this.$moment(forToday).format('X')<this.fullDate*1){//若可选择日期大于七天前，则重新设置开始时间
              this.startValue = this.$moment(this.fullDate*1000).startOf('day').format("YYYY-MM-DD");
              this.start_date = this.$moment(this.startValue).startOf('day').format("X")*1;
              this.getBackupTimeline();
              return false
            }
          }

          //设置binlog
          let canLine = this.$refs.canLine;
          let binlogStart=this.start_date>this.fullDate?this.start_date:this.fullDate;//binlog开始时间
          let binlogNum = (this.binlogDate-binlogStart)/(this.end_date-this.start_date);//binlog占时间轴百分比
          if(binlogNum>0){//如果选择的时间有binlog
            canLine.style.width = binlogNum*100 + '%' ;
            canLine.style.left = (binlogStart-this.start_date)/(this.end_date-this.start_date)*100 + '%';
            canLine.style.maxWidth =100-parseFloat(canLine.style.left) + '%' ;
          }else{
            canLine.style.width = 0 + '%' ;
            if(dt.incre_dates.length<=0){
              this.$message.warning('所选时间区间没有可选择时间点，请修改时间区间~');
              this.showLine = false;
              this.timeline = null;
              this.$parent.showLine = true;
            }
          }

          //设置备份时间点数组
          this.incre_dates = dt.incre_dates;
          this.allIncre = dt.incre_dates.concat([this.binlogDate,this.fullDate]);//备份时间点加上binlog结束时间点和fullDate
         
          this.clickDot(dt.incre_dates[0]);//设置默认选择点
       
          this.timeline = dt.incre_dates[dt.incre_dates.length-1];

          //添加提示时间点---0点提示
          this.dateTips=[];
          let days = Math.abs(this.$moment(this.endValue).endOf('day').diff(this.$moment(this.startValue).startOf('day'), 'days'));
          for(let i=0;i<=days;i++){
            this.dateTips.push(this.$moment(this.startValue).add(i, 'd').startOf('day').format('X'));
          }
        }
        
      });
    },
  
    //点击时间轴---计算百分比
    lineMouseDown(e){
      let allLineTime = this.$refs.allLineTime;
      let percentNum = (e.offsetX-6)/(allLineTime.offsetWidth*1);
     
      this.setSelTime(percentNum);
    },
    //可选择线的区域点击
    canLineMouseDown(e){
      let canLine = this.$refs.canLine;
      let allLineTime = this.$refs.allLineTime;
      let percentNum = e.offsetX/(allLineTime.offsetWidth*1);
      if(parseFloat(canLine.style.left)>0){
        percentNum = e.offsetX/(allLineTime.offsetWidth*1)+(parseFloat(canLine.style.left)/100);
      }
      this.setSelTime(percentNum);
    },
    //点击备份点---计算百分比
    clickDot(incre){
      let percentNum = (incre-this.start_date)/(this.end_date-this.start_date);
      this.setSelTime(percentNum);
    },
    //设置当前值
    setSelTime(percentNum){
      let selDot = this.$refs.selDot;
      selDot.classList.remove('sel_dot_left');
      selDot.classList.remove('sel_dot_right');

      let percent = percentNum;
      this.timeline= (this.end_date-this.start_date)*percent+this.start_date;
      //如果当前值不在binlog范围内，则不可以滑动，只能选择就近的点
      if(this.timeline>this.binlogDate || this.timeline<this.fullDate){
        this.allIncre.sort((a,b)=>{
            return Math.abs(a-this.timeline)-Math.abs(b-this.timeline);
        });
        this.timeline = this.allIncre[0];
        percent = (this.timeline-this.start_date)/(this.end_date-this.start_date);
      }
      //设置选中点日期时间
      this.selTime = this.$moment(this.timeline*1000).format('YYYY-MM-DD HH:mm:ss');
      selDot.style.left = percent*100 + '%' ;

      //大于90%或者小于10%，提示框位置变化
      if(percent*100<10){
        selDot.classList.add('sel_dot_left');
      }
      if(percent*100>90){
        selDot.classList.add('sel_dot_right');

      }

    },
    //时间轴推拽
    dragDown(e){
      let allLineTimeWidth = this.$refs.allLineTime.offsetWidth*1;
      let selDot = this.$refs.selDot;
      //算出鼠标相对元素的位置
      let disX = e.clientX - selDot.offsetLeft;

      document.onmousemove = (e)=>{//鼠标按下并移动的事件
          //用鼠标的位置减去鼠标相对元素的位置，得到元素的位置
          let left = (e.clientX - disX)/allLineTimeWidth*100; 
          
          //移动当前元素
          if(left>=100){
            left = 100;
          }else if(left<=0){
            left = 0;
          }
          this.setSelTime(left/100);
      };
      document.onmouseup = (e) => {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    },
    //设置备份点位置
    setLeft(incre){
      return  `left:${(incre-this.start_date)/(this.end_date-this.start_date)*100}%`
    },
  },
};
</script>
<style lang='scss' scoped>
.time_con{
  padding-bottom: 20px;
}
.line_time{
  position: relative;
  padding: 70px 0 20px;
  -webkit-user-select:none;
   -moz-user-select:none;
   -ms-user-select:none;
   user-select:none;
  .all_line{
    width: 90%;
    margin: 0 5%;
    padding: 20px 0;
  }
  .line{
    width: 100%;
    height: 3px;
    background: #ccc;
    position: relative;
  }
  .can_line{
    background: #1890ff77;
    height: 3px;
    width: 20%;
    position: absolute;
    left: 0;
    span{
      position: absolute;
      right: 0;
      margin-top: 20px;

    }
  }
  .reference{
    width: 1px;
    height: 8px;
    border: 0;
    background: #bbb;
    position: absolute;
    top: -3px;
    white-space: nowrap;
    em{
      color: #bbb;
      position: absolute;
      transform: translateX(-50%);
      margin-top: 15px;
      font-size: 12px;
    }
  }
  .dot{
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 2px solid $sel_color;
    background: white;
    position: absolute;
    top: -3px;
    white-space: nowrap;
    margin-left: -4px;
  }
  .dot_all{
    em{
      display: none;
      color: $sel_color;
      transform: translateX(-50%);
      margin-top: 25px;
    }
  }
  .dot_all:hover{
    width: 10px;
    height: 10px;
    border: 2px solid $sel_color;
    top: -4px;
    em{
      display: inline-block;
    }
  }
  .sel_dot{
    width: 12px;
    height: 12px;
    top: -5px;
    border: 2px solid $text_yellow;
    box-shadow: 0 0 10px 4px #faa30255;
    z-index: 5;
    position: absolute;
    em{
      position: absolute;
      top: -50px;
      border: 1px solid #ccc;
      display: inline-block;
      padding: 0 20px;
      line-height: 26px;
      border-radius: 13px;
      white-space: nowrap;
      transform: translateX(-50%);
      color: $text_yellow;
    }
    i{
      contain: '';
      border: 1px solid #ccc;
      background: white;
      width: 10px;
      height: 10px;
      display: block;
      position: absolute;
      transform: rotate(45deg);
      bottom: -4px;
      left: 50%;
      border-top: 0;
      border-left: 0;
    }
  }
  .sel_dot_left{
    em{
      transform: translateX(-20%);
    }
    i{
      left: 20%;
    }
  }
  .sel_dot_right{
    em{
      transform: translateX(-80%);
    }
    i{
      left: 80%;
    }
  }
}
.ant-calendar-picker{
  margin-left: 20px;
}
</style>

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