<template>
    <el-dropdown :hide-on-click="false" :show-timeout="100" trigger="click">
      <el-button plain>
        Platfroms({{ platforms.length }})
        <i class="el-icon-caret-bottom el-icon--right" />
      </el-button>
      <el-dropdown-menu slot="dropdown" class="no-border">
        <el-checkbox-group v-model="platforms" style="padding: 5px 15px;">
          <el-checkbox v-for="item in platformsOptions" :key="item.key" :label="item.key">
            {{ item.name }}
          </el-checkbox>
        </el-checkbox-group>
      </el-dropdown-menu>
    </el-dropdown>
  </template>
  
  <script>
  export default {
    props: {
      value: {
        required: true,
        default: () => [],
        type: Array
      }
    },
    data() {
      return {
        platformsOptions: [
          { key: 'a-platform', name: 'a-platform' },
          { key: 'b-platform', name: 'b-platform' },
          { key: 'c-platform', name: 'c-platform' }
        ]
      }
    },
    computed: {
      platforms: {
        get() {
          return this.value
        },
        set(val) {
          this.$emit('input', val)
        }
      }
    }
  }
  </script>