Is it considered proper to initialize an empty array within the data object of a Vue.js component?

For my component, I am in need of multiple empty arrays and predefined objects. The data object structure provided below seems to be effective for my purpose. However, I am uncertain if this is the optimal pattern and whether it might lead to unforeseen consequences.

Here is an excerpt from a Vue component that I have created.

<template>
 //html
</template>

<script>
export default {
    name: "SomeComponent",
    data() {
        let dates = []
        let open = []
        let closed = []
        let replied = []
        let option = {
            title: {
                text: "Summary",
            },
            tooltip: {
                trigger: "axis",
            },
            legend: {
                data: [{
                        name: "Open",
                        icon: "circle"
                    },
                    {
                        name: "Closed",
                        icon: "circle"
                    },
                    {
                        name: "Replied",
                        icon: "circle"
                    },
                ],
            }
        }
        return {
            dates,
            open,
            closed,
            replied,
            option,
            theme,
        }
    },
}
</script>

Answer №1

Generating it dynamically through iteration could enhance readability, though it may increase complexity as well. This type of pattern doesn't surprise me.

In the meantime, I suggest something along these lines:

<script>
export default {
  data() {
    return {
      dates: [],
      open: [],
      closed: [],
      replied: [],
      option: {
        title: {
          text: 'Summary',
        },
        tooltip: {
          trigger: 'axis',
        },
        legend: {
          data: [
            {
              name: 'Open',
              icon: 'circle',
            },
            {
              name: 'Closed',
              icon: 'circle',
            },
            {
              name: 'Replied',
              icon: 'circle',
            },
          ],
        },
      },
    }
  },
}
</script>

The return statement within the data method is crucial for readability and can be found in the documentation as well.

This approach will ensure all state changes reactively if modified with a method or similar.

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