echarts 缩放屏幕 resize 多图表功能

 1     drawLine(data){ 
 7           that.myChartA = echarts.init(document.getElementById(obj))
 8           that.myChartA.setOption(option,true)                      //画图
 9           that.addLoadEvent(that.myChartA.resize);                   //添加 监听屏幕缩放
10           setTimeout(function(){                                      
11             that.myChartA.resize();
12           },1)
13     },
14     addLoadEvent(fn){
15       let that = this;
16       var old = window.onresize;
17       if(typeof window.onresize != 'function'){                     //防止多个window.onresize   冲突  解决
18         window.onresize = fn;
19       }else{
20         window.onresize = function(){                                 
21           old();
22             setTimeout(function(){                                     //个别时候无法刷新echarts 延迟1MS  解决
23               fn();
24             },1)
25           }
26       }
27   },