How do I display one object of an array in Vue.JS

Question

Let's say I have this list of objects in Vue.JS

data () {
return{
  examples: [
    {
      exampleID: 5,
      exampleText: 'foo'
    },
    {
      exampleID: 3,
      exampleText: 'bar'
    }
  ]
}
}

Now let's say I want to display the object with the exampleID of 3 in an element i created before

   <Task 
  v-for="example in examples"
  :key="example.exampleID"
  :example="example"
/>

I want to display everything, that is in the object (the ID and the text)

Task component :

<template>
    <div class="exercise">
        <div class="exercise-id">
            <h1>ID NUMBER: {{ example.exampleID }}</h1>
        </div>
        <div class="exercise-task">
            <h2>{{ example.exampleText}}</h2>
        </div>
    </div>
</template>
 
<script>
 
export default {
  name: 'Task',
  props: ['example']
}
</script>

your question is not clear enough, please share the Task component code — Boussadjra Brahim
– Boussadjra Brahim, Commented Nov 11, 2020 at 16:56
The Task component is in an external file in the components folder. Here's the code pastebin.com/T1czudfh — David D.
– David D., Commented Nov 11, 2020 at 16:57
Try adding this below v-for statement.................... v-show="example.exampleID === 3" — Amaarockz
– Amaarockz, Commented Nov 11, 2020 at 17:20
@DavidD if the below answers are working fine please do upvote it so that it would be encouraging. Thanks — Amaarockz
– Amaarockz, Commented Nov 11, 2020 at 17:29

Boussadjra Brahim · Accepted Answer · 2020-11-11 17:20:44Z

2

You shouldn't use v-if and v-for in the same element, in this case i suggest to use a computed property that only return the desired example :

data () {
return{
  examples: [
    {
      exampleID: 5,
      exampleText: 'foo'
    },
    {
      exampleID: 3,
      exampleText: 'bar'
    }
  ]
}
},
computed:{
    myExample(){
       return this.examples.find(ex=>ex.exampleID===3)
    }
}

then render it like :

  <Task   :example="myExample"/>

answered Nov 11, 2020 at 17:20

Boussadjra Brahim

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1 Comment

David D. Over a year ago

Thank you this one works just as fine as the v-show directive, but I am still gonna stick to your solution if you say it's more performant!

Amaarockz · Accepted Answer · 2020-11-11 17:25:35Z

2

Another efficient way of doing it without v-for is

data () {
return{
  examples: [
    {
      exampleID: 5,
      exampleText: 'foo'
    },
    {
      exampleID: 3,
      exampleText: 'bar'
    }
  ],
  id: 3
}
},
computed:{
    myExample(){
       return id => this.examples.find(ex=>ex.exampleID===id)
    }
}

rendering part will be like

<Task :example="myExample(id)"/>

In this way you no need to hardcode the value as 3 in the computed property.

answered Nov 11, 2020 at 17:25

Amaarockz

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2 Comments

Boussadjra Brahim Over a year ago

computed is a property not a method, it doesn't accept parameters, try to ,call it id with this something like return this.examples.find(ex=>ex.exampleID===this.id) and <Task :example="myExample"/>

Boussadjra Brahim Over a year ago

could you provide running example? you could use the running example in this answer

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