echarts在柱状图上显示数值

var option ={
     
					tooltip: {
     },
					xAxis: {
     
						type:'value'
					},
					 grid: {
     
						left: "3%",
						right: "1%",
						bottom: "-1%",
						width: "300px",
						height: "300px",
						containLabel: true
					},
					yAxis: {
     
						type:'category',
						data:this.yardList.map(function(item){
     
							return item[1]
						})
					},
					series: [
						{
     
							// name: "购买总人数",
							type: "bar",
							barWidth: "15px",
							 barGap:"10%",   
							// barCategoryGap是不同类目间的距离
							barCategoryGap: "1%",
							data:this.yardList.map(function(item){
     
								return item[2]
							}),
							itemStyle: {
     
								color: "#9ACFBD"
							},
							// 实现数字展示在柱状图
							label: {
     
								show: true,
								position: 'inside',
								color:'black'
							},
						}
					]
				}