Using Vuejs to dynamically determine modal size based on a condition

I have a Bootstrap-Vue modal on my page with a large size. I need to adjust the size of the modal based on a specific condition - if it is true, the size should be lg, if it is false, the size should be md. Is there a way to achieve this using Vue.js properties?

<b-modal id="modal-1" size="lg">
  <upgrade-popup></upgrade-popup>
</b-modal>

I'm looking for a solution similar to how we use conditional rendering of classes in Vue.

v-bind:class="{ active: isActive, 'text-danger': hasError }"

I tried using a condition like this for the size property, but it didn't work as expected.

:size="{'lg': freeUser, 'md': !freeUser}"
javascriptvue.jsbootstrap-vue

Answer №1

Using Shorthand Conditional Statements

Utilizing a shorthand if statement like 

:size="freeUser ? 'lg' : 'md'"
allows for quick decision-making without the need for extensive markup.

Optimizing with Computed Properties

Another option is to use computed properties, which store values and only recompute when necessary, based on changes in internal properties such as freeUser.

<b-modal :size="getSize"></b-modal>


<script>
{
  computed: {
    getSize() {
      return this.freeUser ? 'lg' : 'md'
    }
  }
}
</script>

Enhancing Flexibility with Methods

The method approach provides flexibility for handling complex conditions or scenarios, similar to computed properties. Unlike computed properties, methods allow for passing in properties, which can be advantageous when dealing with content within a v-for loop.

<b-modal :size="getSize(freeUser)"></b-modal>


<script>
{
  methods: {
    getSize(freeUser) {
      return this.freeUser ? 'lg' : 'md'
    }
  }
}
</script>

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