What's the process for changing this arrow function into a regular function?

Hello from a child component in Vue.js. I am facing an issue while trying to pass data from the parent via sensorData. The problem lies in the fact that the arrow function used for data below is causing the binding not to occur as expected. Can anyone guide me on how to convert this function into a regular one so that the correct this binding can take place?

export default {
  name: "SensorChart",
  props: ["sensorData"],

  data() {
    return {
      chartOptionsLine: {
        xAxis: {
          data: ["A", "B", "C", "D", "E", "F", "G"]
        },
        yAxis: {
          type: "value"
        },

        series: [
          {
            type: "line",
            // data: this.sensorData
            data: [910, 423, 61, 752, 262, 3625, 119]
          }
        ],
        title: {
          text: "Sample Data",
          x: "center",
          textStyle: {
            fontSize: 20
          }
        },
        color: ["#1271c2"]
      }
    };
  }
};

Answer №1

Works perfectly!

export default {
  name: "SensorChart",
  props: ["dataSample", "labelSample"],

  data: function() { 
    return {
      chartOptionsLine: { 
        xAxis: {
          labels: this.labelSample
        },
        yAxis: {
          type: "value"
        },

        series: [
          {
            type: "line",
            values: this.dataSample
          }
        ],
        title: {
          text: "Sensor Information",
          position: "center",
          style: {
            size: 24
          }
        },
        colorScheme: ["#127ac2"]
      }
    }
  }
};

Answer №2

An arrow function expression serves as a concise substitute for a traditional function expression, with some limitations that restrict its usability in certain scenarios.

Distinguishing features and constraints of arrow functions compared to traditional functions include:

  • Arrow functions lack their own bindings to this, arguments, or super, making them unsuitable for use as methods.
  • Arrow functions do not have access to the new.target keyword.
  • Arrow functions are not appropriate for call, apply, and bind methods, which depend on establishing a specific scope.
  • Arrow functions cannot be employed as constructors.
  • Arrow functions are unable to utilize yield within their body.

For further information, visit:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions#comparing_traditional_functions_to_arrow_functions

If you prefer the conventional approach, consider using the following code snippet:

export default {
  ...
  data: function() { return {...} }
}

Alternatively, when opting for arrow functions, it's important to note that while they lack their own this pointer, only arguments can be passed via call() or apply(), without the ability to bind this explicitly.

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