Mastering the art of iterating through an array of objects in Vue/Nuxt

Question

Mastering the art of iterating through an array of objects in Vue/Nuxt

<template>
  <div>
    <h1>Greetings from the World</h1>
    <div>
      <span :for="day in days">{{ day }} </span>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Greetings',
  data() {
    return {
      days: ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'],
    }
  },
}
</script>

I seem to be having trouble iterating through my `days` array. The error message I am receiving is displayed below.

Error: [Vue warn]: Property or method "day" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See: https://v2.vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.

javascript vue.js nuxt.js

Answer 1

Answer №1

Check out this related query: How to properly loop through an array and display data using Nuxt with v-for

Just like in that example, I highly recommend assigning unique IDs for correct handling of :key to avoid any ESlint issues.

<template>
  <div>
    <h1>Greetings Universe</h1>
    <div>
      <span v-for="day in days" :key="day.id">
        {{ day.name }}
      </span>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Hello',
  data() {
    return {
      days: [
        { id: 1, name: "Monday" },
        { id: 2, name: "Tuesday" },
        { id: 3, name: "Wednesday" },
        { id: 4, name: "Thursday" },
        { id: 5, name: "Friday" },
        { id: 6, name: "Saturday" },
        { id: 7, name: "Sunday" },
      ]
    }
  },
}
</script>

:key is crucial, learn more here: https://v2.vuejs.org/v2/style-guide/#Keyed-v-for-essential

This blog post offers insight on the topic:

Answer 2

Check out this related query: How to properly loop through an array and display data using Nuxt with v-for

Just like in that example, I highly recommend assigning unique IDs for correct handling of :key to avoid any ESlint issues.

<template>
  <div>
    <h1>Greetings Universe</h1>
    <div>
      <span v-for="day in days" :key="day.id">
        {{ day.name }}
      </span>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Hello',
  data() {
    return {
      days: [
        { id: 1, name: "Monday" },
        { id: 2, name: "Tuesday" },
        { id: 3, name: "Wednesday" },
        { id: 4, name: "Thursday" },
        { id: 5, name: "Friday" },
        { id: 6, name: "Saturday" },
        { id: 7, name: "Sunday" },
      ]
    }
  },
}
</script>

:key is crucial, learn more here: https://v2.vuejs.org/v2/style-guide/#Keyed-v-for-essential

This blog post offers insight on the topic:

Answer 3

Answer №2

It is recommended to utilize the v-for directive in the following manner:

<span v-for="day in days">{{ day }}</span>

The directives start with v- and are automatically linked to the component's methods and attributes.

Answer 4

It is recommended to utilize the v-for directive in the following manner:

<span v-for="day in days">{{ day }}</span>

The directives start with v- and are automatically linked to the component's methods and attributes.

Mastering the art of iterating through an array of objects in Vue/Nuxt

I seem to be having trouble iterating through my `days` array. The error message I am receiving is displayed below.

Answer №1

Answer №2

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Mastering the art of iterating through an array of objects in Vue/Nuxt

I seem to be having trouble iterating through my days array. The error message I am receiving is displayed below.

Answer №1

Answer №2

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I seem to be having trouble iterating through my `days` array. The error message I am receiving is displayed below.