Question

我是vue.js 2的新手。我目前正在使用vue框架重新创建此图： https://codepen.io/apexcharts/pen/rqWeBX

我需要从generateDayWiseTimeSeries（）函数获取一些数据。我目前正在从DATA（）调用它，这导致我遇到此错误：

[Vue warn]: Error in data(): "ReferenceError: generateDayWiseTimeSeries is not defined"

我尝试使用.this语法返回数据，并将函数放置在created：部分中，但是没有运气。

这是我的vue.js代码，如果您能告诉我这是否是正确的方法，我将不胜感激。

Vue.component("apexchart", VueApexCharts);

const Dashboard = {
  data: function() {
    return {
     series_5: [
        generateDayWiseTimeSeries(new Date("22 Apr 2017").getTime(), 115, {
          min: 30,
          max: 90
        })
      ]
    };
  },
  components: {
    apexcharts: VueApexCharts
  },
  methods: {
    generateDayWiseTimeSeries: function(baseval, count, yrange) {
      var i = 0;
      var series = [];
      while (i < count) {
        var x = baseval;
        var y =
          Math.floor(Math.random() * (yrange.max - yrange.min + 1)) +
          yrange.min;

        series.push([x, y]);
        baseval += 86400000;
        i++;
      }
      return series;
    }
    },
  ,
  template: `
    // THE TEMPLATE IS USELESS FOR THIS PROBLEM
   <div class="container">

        <div class="row" > 
            <div class="col-sm col-xs-12">
                    <div  class="card " style ="margin-bottom : 20px"  >

                        <div class="card-body">
                            <h5 class="card-title">Indices de ventes</h5>
                            <p class="card-text">Ventes totales .</p>
                            <div><apexchart  type="bar" :options="options_1" :series="series_1"></apexchart></div>
                        </div>
                    </div>
               </div>
                <div class="col-sm col-xs-12">

                                <div  class="card " style ="margin-bottom : 20px"  >

                        <div class="card-body">
                            <h5 class="card-title">Ventes</h5>
                            <p class="card-text">Indice des ventes total.</p>
                           <div><apexchart type="line" :options="options_2" :series="series_2"></apexchart></div>
                        </div>
                    </div>
                </div>



         </div> // THE TEMPLATE IS USELESS FOR THIS PROBLEM

`
};

编辑：已修改

series_5: [
        this.generateDayWiseTimeSeries(new Date("22 Apr 2017").getTime(), 115, {
          min: 30,
          max: 90
        })
      ]

现在它似乎正在工作！

Answer 1

可以通过将this添加到对generateDayWiseTimeSeries()的呼叫中来解决您的问题。

series_5: [
  this.generateDayWiseTimeSeries(new Date("22 Apr 2017").getTime(), 115, { min: 30, max: 90 })
]

它没有声明为全局函数，因此在调用它时需要提供上下文。

话虽如此，看来您正在寻找的是computed property。修改您的JavaScript，如下所示：

const Dashboard = {
  data: function() {
    return {};
  },
  components: {
    apexcharts: VueApexCharts
  },
  computed: {
    series_5() {
      return this.generateDayWiseTimeSeries(new Date("22 Apr 2017").getTime(), 115, { min: 30, max: 90 });
    }
  },
  methods: {
    generateDayWiseTimeSeries: function(baseval, count, yrange) {
      var i = 0;
      var series = [];
      while (i < count) {
        var x = baseval;
        var y =
          Math.floor(Math.random() * (yrange.max - yrange.min + 1)) +
          yrange.min;

        series.push([x, y]);
        baseval += 86400000;
        i++;
      }
      return series;
    }
    },
  ,

  ...

}

通常，逻辑不属于data()函数。按照惯例，data()仅返回代表Vue实例数据的JSON对象。

从data（）调用函数

1 个答案: