如果url Vue中有查询参数，则自动显示modal

import Vue from 'vue'
import VueRouter from 'vue-router'
import VueModal from 'vue-modal'

Vue.use(VueRouter)
Vue.use(VueModal)

export default {
  created() {
    this.$router.beforeEach((to, from, next) => {
      if (to.query.modal === 'true') {
        this.$modal.show('my-modal')
      } else {
        this.$modal.hide('my-modal')
      }
      next()
    })
  }
}

<template>
  <div>
    <vue-modal name="my-modal">
      <!-- modal的内容 -->
    </vue-modal>
  </div>
</template>