Guidelines for sorting through items in Vue 3

Question

Guidelines for sorting through items in Vue 3

In the past, Vue 2 allowed us to easily filter items using the | and filters syntax. However, this method is no longer supported in Vue 3.

Instead, we now use the "computed" property to transform a single value into another. But what about changing values within an array?

In Vue 2

<template>
<ul>
  <li v-for="(index,value) in array1" :key="index">
   {{ value | valuefilter}}
  </li>
</ul>
</template>

<script>
...
export {
...
  filters:{
    valuefilter(value){
      return '$'+ value
    }
  }
...
}
</script>

javascript vue.js vuejs2 vuejs3 vue-filter

Answer 1

Answer №1

To achieve the desired result, it's recommended to use a computed property for filtering the data in advance and then looping over the computed property instead of the raw data.

Essentially, this approach functions similarly to utilizing a filter method but with the added benefit of maintaining a cleaner template structure:

Template

<ul>
  <li v-for="(value, index) in filtered" :key="index">
   {{ value }}
  </li>
</ul>

Options API

data: () => ({
  array1: [1,2,3,4,5]
}),
computed: {
  filtered() {
    return this.array1.map(item => `$${item}`);
  }
}

Composition API

setup() {
  const array1 = reactive([1,2,3,4,5]);
  const filtered = computed(() => array1.map(item => `$${item}`));
  return {
    filtered
  }
}

Answer 2

To achieve the desired result, it's recommended to use a computed property for filtering the data in advance and then looping over the computed property instead of the raw data.

Essentially, this approach functions similarly to utilizing a filter method but with the added benefit of maintaining a cleaner template structure:

Template

<ul>
  <li v-for="(value, index) in filtered" :key="index">
   {{ value }}
  </li>
</ul>

Options API

data: () => ({
  array1: [1,2,3,4,5]
}),
computed: {
  filtered() {
    return this.array1.map(item => `$${item}`);
  }
}

Composition API

setup() {
  const array1 = reactive([1,2,3,4,5]);
  const filtered = computed(() => array1.map(item => `$${item}`));
  return {
    filtered
  }
}

Answer 3

Answer №2

To create a global filter that can be accessed by all components in your application, follow these steps:

MainFilter.js

const app = initializeApp(MainApp)

app.config.filters.globalFilters = {
  customFilter(item) {
    return '#' + item
  }
}

MyCustomComponent.vue

<template>
<ul>
  <li v-for="(id,item) in itemList" :key="id">
   {{ customFilter(item) }}
  </li>
</ul>
</template>

Answer 4

To create a global filter that can be accessed by all components in your application, follow these steps:

MainFilter.js

const app = initializeApp(MainApp)

app.config.filters.globalFilters = {
  customFilter(item) {
    return '#' + item
  }
}

MyCustomComponent.vue

<template>
<ul>
  <li v-for="(id,item) in itemList" :key="id">
   {{ customFilter(item) }}
  </li>
</ul>
</template>

Guidelines for sorting through items in Vue 3

Answer №1

Answer №2

MainFilter.js

MyCustomComponent.vue

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