js string類型轉換成數組對象類型---eval

js string類型轉換成數組對象類型

eval

該方法只接受原始字符串作為參數，如果 string 參數不是原始字符串，那么該方法將不作任何改變地返回。因此請不要為 eval() 函數傳遞 String 對象來作為參數。

 插件原始數據

/*const data = [
  { time: "00:00", value: 80 },
  { time: '06:00', value: 70 },
  { time: '12:00', value: 120 },
  { time: '18:00', value: 90 },
  { time: '24:00', value: 168 }
];*/

后台的數據

const trainingData = () => {
  return builder([{
    'training': {
      'xaxis': ['00:00', '06:00', '12:00', '18:00', '24:00'],
      'data': [0, 30, 45, 60, 30]
    }
  }])
}

拼接的字符串：[{time:"00:00",value:0},{time:"00:00",value:0},{time:"06:00",value:30},{time:"12:00",value:45},{time:"18:00",value:60},{time:"24:00",value:30},{time:"24:00",value:30}]
TrainingStatus.vue?4f97:199 最后的結果數據[{time:"00:00",value:0},{time:"00:00",value:0},{time:"06:00",value:30},{time:"12:00",value:45},{time:"18:00",value:60},{time:"24:00",value:30},{time:"24:00",value:30}]
TrainingStatus.vue?4f97:200 數據類型string
TrainingStatus.vue?4f97:196 拼接的字符串：[{time:"00:00",value:0},{time:"00:00",value:0},{time:"06:00",value:30},{time:"12:00",value:45},{time:"18:00",value:60},{time:"24:00",value:30},{time:"24:00",value:30}]
TrainingStatus.vue?4f97:199 最后的結果數據[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
TrainingStatus.vue?4f97:200 數據類型object

 created () {
    getRoleList({ t: new Date() })
    getTrainingData().then(res => {
      this.trainingdata = res.data[0].training
      //心率折線數據
      for(var i =0 ; i<this.trainingdata.xaxis.length ; i++){
         var time1 = this.trainingdata.xaxis[i]
         var value1 = this.trainingdata.data[i]
        if(i==0){
          this.databinjie = '[{'+ 'time:"' +time1 + '",' + 'value:' +value1 + '},'
        }
         this.databinjie += '{'+ 'time:"' +time1 + '",' + 'value:' +value1 + '},'
        var changdu = this.trainingdata.xaxis.length -1
        if(i==changdu){
          this.databinjie += '{'+ 'time:"' +time1 + '",' + 'value:' +value1 + '}]'
        }
      }
      console.log('拼接的字符串：'+this.databinjie)
      this.data =  eval(this.databinjie)
      // this.data = JSON.parse(this.data)
      console.log('最后的結果數據'+this.data)
      console.log('數據類型'+typeof(this.data))
    })
  },