Is it possible to utilize Vue.js' v-if directive to validate if a certain value is present within an array

In my form, I have a checkbox and I want to be able to use v-if directly to display or hide sections based on the selected checkbox values.

Can this be done using v-if, or do I need to use watch:?

Answer №1

Yes, it is definitely possible to achieve that. One suggestion would be to incorporate a data model tied to the checkbox that can switch between true and false values. This will enable you to control the visibility of content using v-if.

For instance:

<template>
    <input type="checkbox" v-model="showContent" value="triggerString" />
    <p v-if="showContent === 'triggerString'">Lorem ipsum</p>
</template>

<script>
    export default {
        data() {
            return {
                showContent: false
            }
        }
    }
</script>

In general, it's advisable to avoid using watch unnecessarily.

Update: Based on the provided JSFiddle, here's how you can implement it solely with v-if

<template>
    <input type="checkbox" 
           v-model="section"
           name="section"
           value="Epiphone"
           id="epiphone">
    <label for="epiphone">Epiphone</label>

    <section v-if="section.includes('Epiphone')">
        <h1>Epiphone</h1>
    </section>
</template>

<script>
    export default {
        data() {
            return {
                section: []
            }
        }
    }
</script>

As there is bidirectional binding happening with the section array, an extra div object is not required since all tracking occurs within the section object.

Remember that v-if supports JavaScript expressions, allowing you to integrate logic directly into it instead of relying on a separate watch method.

I hope this clarifies your query!

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