What is the interaction between Vue's v-model and the update:modelValue directive, and how can we customize the default behavior to prevent it from

Could someone provide an explanation of the usage of v-model with :modelValue and update:modelValue? What happens when both are used together? In the code snippet below, a component is shown:

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/3.4.8/vue.global.min.js"></script>
  <select-component
    v-model="selectedOrganization"
    :tooltip="selectedOrganization?.name"
    :getOptionLabel="organization => organization.name"
    :options="organizations"
    :searchable="true"
    :clearable="false"
    @update:modelValue="changeOrRedirectModal"
    @search="organizationSearchHandlerAsync">
  </select-component>

It is important to note that this component utilizes v-select.

<v-select
        ref="select"
        :title="tooltip"
        class="select-component"
        :class="{ 'error-select': hasErrorsInternal }"
        :disabled="disabled"
        :style="width ? `width: ${width}` : null"
        v-bind="$attrs"
        :modelValue="modelValue"
        :options="options"
        :taggable="taggable"
        :multiple="multiple"
        :placeholder="placeholder"
        @search:focus="opened"
        @update:modelValue="onItemSelected"
        @search="(query, loadDelegate) => $emit('search', query, loadDelegate)">
        <div v-for="(s, name) in $slots" :key="name" :slot="name">
            <renderer :vnode="s" />
        </div>

        <div
            v-for="(f, name) in $slots"
            :key="name"
            :slot="name"
            slot-scope="props"
            :title="showItemsTooltips ? props.fullName : null">
            <renderer :vnode="f(props)" />
        </div>
    </v-select>

I am looking for a solution to prevent the default logic from changing the title when update:modelValue is triggered, but only when the user presses the accept button on a redirect model (another component with props to show and methods to redirect to another organization by URL or hide itself without redirection).

Using v-model results in changing the title regardless of the button pressed. How can this issue be resolved? Changing v-model to :modelValue might not solve the issue as there is no value change within the changeOrRedirectModal logic.

Answer №1

The v-model attribute contains the current value, whether it is default or updated without manual control. The @update:modelValue event acts like a trigger that fires after the v-model is updated. I am unsure about the specifics of your use case involving other components and redirections upon click. It appears that some validation may be required before updating the v-model value. Have you considered using a computed value (:value="computedValue") instead of v-model and implementing an event change to manage the new value?

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