<div v-for='(item,index) in datalist' @mouseover='chartMouseover(index)' @mouseleave='chartMouseLeave(index)'> </div>
chartMouseover(index) { this.myChart.dispatchAction({ type: 'highlight', dataIndex: index }) }, chartMouseLeave(index) { this.myChart.dispatchAction({ type: 'downplay', dataIndex: index }) }