const Toast = {}
Toast.install = (Vue, options) => {
  Vue.prototype.$toast = (msg, duration = 0.8) => {
    const modal = weex.requireModule('modal')
    modal.toast({
      message: msg,
      duration: 0.8
    })
  }
}
Vue.use(Toast)

<template>
 <div>
 <div class="box" @click="onclick" @longpress="onlongpress" @appear="onappear" @disappear="ondisappear"></div>
  </div>
</template>

<script>
 const modal = weex.requireModule('modal')

 export default {
   methods: {
     onclick (event) {
       this.$toast("aaa", 0.8)
     },
     onlongpress (event) {
       console.log('onlongpress:', event)
       modal.toast({
         message: 'onlongpress',
         duration: 0.8
       })
     },
     onappear (event) {
       console.log('onappear:', event)
       modal.toast({
         message: 'onappear',
          duration: 0.8
        })
      },
      ondisappear (event) {
        console.log('ondisappear:', event)
        modal.toast({
          message: 'ondisappear',
          duration: 0.8
        })
      }
   }
 }
</script>

<style scoped>
.box {
  border-width: 2px;
  border-style: solid;
  border-color: #BBB;
  width: 250px;
  height: 250px;
  margin-top: 250px;
  margin-left: 250px;
  background-color: #EEE;
}
</style>

Vue.use = function (plugin) {
  if (plugin.installed) {
    return
  }
  var args = toArray(arguments, 1);
  args.unshift(this);
  if (typeof plugin.install === 'function') {
    plugin.install.apply(plugin, args);
  } else if (typeof plugin === 'function') {
    plugin.apply(null, args);
  }
  plugin.installed = true;
  return this
};

function toArray (list, start) {
 start = start || 0;
 var i = list.length - start;
 var ret = new Array(i);
 while (i--) {
  ret[i] = list[i + start];
 }
 return ret
}