Vue 中集成 Chart.js 并处理 DOM 渲染时机

Vue.directive('loaded-callback', {
 inserted: function (el, binding, vnode) {
  binding.value(el, binding, vnode)
 }
})

npm install chart.js --save

<template>
  <canvas refs="chartcanvas" v-loaded-callback="setCanvas"></canvas>
</template>
<script type="text/javascript">
require('chart.js')
export default{
  name: 'components-base-chartjs',
  props: {
    'data': {},
    'options': {},
    'type': {}
  },
  data:function(){
    return {
      canvas: null,
      chart: null
    }
  },
  watch:{
    canvas: function () { // chart对象生成时触发
      this.initChart()
    },
    data: {
      handler: function () { // 数据变化时触发
        this.updateChart()
      },
      deep: true
    }
  },
  destoryed:function (){
    if(this.cahrt){
      this.cahrt.destroy()
    }
  },
  computed: {
    currentOptions: function (){
      var options = {}
      if(this.options){ // 加载自定义配置参数
        for(var i in this.options){
          options[i] = this.options[i]
        }
      }
      return options
    }
  },
  methods: {
    setCanvas: function(el){ // dom生成时触发
      this.canvas = el
    },
    initChart: function () { // 更新chart结果
      if(this.data && this.currentOptions){ // 保证参数的存在
        this.chart = new Chart(this.canvas.getContext('2d'),{
          type: this.type,
          data: this.data,
          options: this.currentOptions
        })
      }
    },
    updateChart: function () { // 更新chart结果
      this.chart.data = JSON.parse(JSON.stringify(this.data))
      this.chart.update()
    }
  }
}
</script>

<chartjs :options="options" type="pie" :data="data"></chartjs>