https://blog.csdn.net/flitrue/article/details/52841338
import $echarts from ‘echarts‘ import ‘echarts/theme/dark.js‘
let myChart = $echarts.init(document.getElementById(‘barEcharts‘),‘dark‘)
echarts 自定义主题
原文：https://www.cnblogs.com/langqq/p/10583619.html
