echarts条形图添加滚动条

效果展示:

测试数据:

taskList:[{majorDeptName:'测试',finishCount:54,notFinishCount:21},
{majorDeptName:'测试',finishCount:54,notFinishCount:21},
{majorDeptName:'测试',finishCount:54,notFinishCount:21},
{majorDeptName:'测试',finishCount:54,notFinishCount:21},
{majorDeptName:'测试',finishCount:54,notFinishCount:41},
{majorDeptName:'测试',finishCount:54,notFinishCount:41},
{majorDeptName:'测试',finishCount:54,notFinishCount:41},
{majorDeptName:'测试',finishCount:54,notFinishCount:41},
{majorDeptName:'测试',finishCount:54,notFinishCount:41},]
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代码如下:

   initBarchart(){
          this.barChart = this.$echarts.init(this.$refs.barChart);
        let finishData = [];
        let unFinishData = []
	      let chartName = [];
      if (  this.taskList && this.taskList.length > 0) {
          this.taskList.forEach(item => {
          chartName.push(item.majorDeptName)  
          finishData.push(item.finishCount)
          unFinishData.push(item.notFinishCount)
          })
      }
    
	let max = Math.max.apply(null,finishData.concat(unFinishData));
	let emptyData = finishData.map(function(v, i) {
     let item = {
         value: max,
         label: {   
             formatter: '{a|' + v + '}',
             position: 'right',
           
             rich: {
                 a: {
                     color:'#BFF4FF',
                     fontSize:14,
                     padding:[5, 10]
                 }
             }
         }
     }
     return item
	});
	let emptyData2 = unFinishData.map(function(v, i) {
     let item = {
         value: max,
         label: {  
             formatter: '{a|' + v + '}',
             position: 'right',
             rich: {
                 a: {
                     color:'#BFF4FF',
                     fontSize:14,
                     padding:[5, 10]
                 }
             }
         }
     }
     return item
	});
const barGap = '80%'
	let option = {
       tooltip: {
		    show: true,
		    trigger: 'item',
		},
            
        legend: {
          data: ['已完成','未完成'],
          right:'5%',
          //  itemWidth:15, 
          textStyle:{
          color:'#fff'
        },
        },
       grid: {
           top: '10%',
           right: '15%',
           left: '10%',
           bottom: '5%',
           containLabel: true    
       },
	    xAxis: [
		    {
	            type : 'value',
              position: 'top',
                name: '/个',
	            axisLabel:{      //坐标轴字体颜色
	            	show:false,
	            },
	            axisLine:{
	            	show:false,
	            	lineStyle: {
		                  color: "#218BA0",
		            }
	            },
		        axisTick:{       //y轴刻度线
		            show:false
		        },
	            splitLine:{    //网格
	            	show: false,
	            },
	            max: function(value) {
		            return value.max
		        },
		    }
        ],
	    yAxis: [{
	        type: 'category',
	        data:chartName,
            inverse: true,
	        axisTick:{       //y轴刻度线
	           show:false,
             
	        },

	        axisLabel: {
	            formatter: '{value}',
	            color: '#218BA0',
	            fontSize:14
	        },
        	axisLine: {
        		show:false,
	        },
	        splitLine: {
	            show:false
	        },
	    },
	    {
	        type: "category",
	        name: "",
	        axisTick: {
	            show: false,
               
	        },
	        splitLine: {
	            show: false
	        },
	        axisLabel: {
	            show: false,
	        },
	        axisLine: {
	            show: false
	        },
	        inverse: true,
	        data: chartName
	    }],
	    series: [
	       	{
	            type: 'bar',
              show: true,
	            barWidth: '18%',
	                yAxisIndex: 0,
               barGap,
            	silent:true,
	            itemStyle: {
	                normal: {
	                    color: '#11353d',
	                }
	            },
	            label: {
	                show:true,
	            },
	            data: emptyData
	        },
	        {
	            show: true,
	            type: 'bar',
                barGap,
                 yAxisIndex: 1,
	            barWidth: '18%',
                 name:'已完成',
	            z: 2,
	            label: {
                show: false,
            },
	            itemStyle: {
			      		normal: {
		                color: '#03bae2',
		                barBorderRadius: [0,0],
		            }
	            },
	            data: finishData,
	       	},
	       		{
	            type: 'bar',
                show: true,           
	            barWidth: '18%',
              barGap,
	            yAxisIndex: 0,
            	silent:true,
	            itemStyle: {
	                normal: {
	                    color: '#11353d',
	                    barBorderRadius: [0,0],
	                }
	            },
	            label: {
	                show:true,
	            },
	            data: emptyData2
	        },
	        {
	            show: true,
	            type: 'bar',
	            barWidth: '18%',
              barGap,
                   yAxisIndex: 1,
              name:'未完成',
	            z: 2,
	            label: {
	                show: false,
	            },
	            itemStyle: {
				      	normal: {
		                color:'#e27903' ,
		                barBorderRadius: [0,0],
		            }
	            },
	            data: unFinishData,
	       	}
	    ],
        dataZoom: [
  {
                    yAxisIndex:[0,1],//这里是从X轴的0刻度开始
                    show: false,//是否显示滑动条，不影响使用
                    weight:2,
                    type: 'inside', // 这个 dataZoom 组件是 slider 型 dataZoom 组件
                    startValue: 0,
                    endValue: 3, 
                    zoomOnMouseWheel: false,  // 关闭滚轮缩放
                    moveOnMouseWheel: true, // 开启滚轮平移
                    moveOnMouseMove: true  // 鼠标移动能触发数据窗口平移 
                },
               {
                   yAxisIndex: [0,1],//这里是从X轴的0刻度开始
                    show: false,//是否显示滑动条，不影响使用
                    type: 'slider', // 这个 dataZoom 组件是 slider 型 dataZoom 组件
                    fillerColor: "#0089d1", // 滚动条颜色
                    borderColor: "rgba(17, 100, 210, 0.1)",
                    zoomLock:true, // 是否只平移不缩放
                    handleSize:10, // 两边手柄尺寸
                    width:8,
                    heigh:8,
                
                    bottom: 2,
                    backgroundColor: 'rgba(255,255,255,.4)',
                    brushSelect:false,
                    showDetail:false,
                    showDataShadow:false
                }

  ],
         
	};
   if (  this.taskList && this.taskList.length > 4) {
      option.dataZoom[0].show = true
        option.dataZoom[1].show = tru
     }
    this.barChart.setOption(option)
    },```
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