Is it possible to pre-select a value in a PrimeVue Dropdown component?

Situation: Currently, I am incorporating PrimeVue into a Vue.js project. Within this setup, there is a dropdown component sourced from PrimeVue, utilizing an array of objects. The structure of the dropdown component appears as follows:

<template #position>
    <Dropdown
        class="multiselect-fullsize"
        v-model="selectedFilter[index].pos"
        :options="filterPositions"
        optionLabel="name"
        placeholder="Position" />
    </template>

The dropdown component makes use of the :options property, which directly references the subsequent array:

filterPositions: [
    {"name": "0", "value": "0"},
    {"name": "1", "value": "1"},
    {"name": "2", "value": "2"},
    {"name": "3", "value": "3"},
    {"name": "4", "value": "4"},
    {"name": "5", "value": "5"},
    {"name": "6", "value": "6"},
    {"name": "7", "value": "7"},
    {"name": "8", "value": "8"}
  ]

Query: Is there a method to designate a pre-selected item within this PrimeVue dropdown?

Note: As per the details provided in the official documentation, no explicit property exists for setting a pre-selected item. Hence, any potential workaround would likely involve utilization of pure JavaScript.

Answer №1

A confirmation: Absolutely! I found the explanation in the documentation for Dropdown | PrimeVue to be a tad perplexing, especially from my perspective. The issue lies in the fact that simply providing a v-model like

v-model="selectedFilter[index].pos"
is not sufficient; one must also specify an optionValue, which in my scenario is optionValue="value", because the values within filterPositions are labeled with the key value.

It seems that, once this is configured, PrimeVue's Dropdown can validate if the v-model aligns with the optionValue. If not, the v-model will be compared to the entire item in filterPositions. For instance:

If lacking optionValue="value":

{"name": "4", "value": "4"} === 4

If including optionValue="value":

4 === 4

Consequently, in this particular case, my Dropdown component ought to appear as follows:

<Dropdown
    class="multiselect-fullsize"
    v-model="selectedFilter[index].pos"
    :options="filterPositions"
    optionLabel="name"
    optionValue="value"
    placeholder="Position"
/>

Answer №2

filteredList[index].position = {"name": "4", "value": "4"}

Answer №3

simply assign the pre-selected value as a placeholder

<Dropdown
class="multiselect-fullsize"
v-model="selectedFilter"
:options="filterPositions"
optionLabel="name"
optionValue="value"
:placeholder="selectedFilter.value"
/>

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