v-echart 按需加载

import 'v-charts/lib/style.css';
import VeBar from 'v-charts/lib/bar' // 条形图
import VeRadar from 'v-charts/lib/radar' // 雷达
import VeHistogram from 'v-charts/lib/histogram' // 柱状图
import VeRing from 'v-charts/lib/ring' // 环形
import VePie from 'v-charts/lib/pie' // 饼图

Vue.component(VeBar.name, VeBar)
Vue.component(VeRadar.name, VeRadar)
Vue.component(VeHistogram.name, VeHistogram)
Vue.component(VeRing.name, VeRing)
Vue.component(VePie.name, VePie)