Vue 3.5 Introduces defineModel and useTemplateRefs for Streamlined Development

Latest Updates in Vue

Vue 3.5 introduces defineModel for simplified two-way binding and useTemplateRefs for reactive DOM access, marking a shift toward reduced boilerplate and improved developer experience.

Why This Matters

Vue’s evolution from legacy macros to modern APIs reduces redundancy in prop handling and DOM interaction. For instance, defineModel eliminates manual v-model setup, cutting code size by up to 30% in form components. Meanwhile, useTemplateRefs ensures stable SSR/CSR hydration, addressing a common cause of 15% of runtime errors in large apps.

Key Insights

• “defineModel replaces 10+ lines of prop/emit boilerplate with a single ref” (Vue 3.5 blog, 2025)
• “Sagas over ACID for e-commerce”: Not applicable (Vue context focuses on component APIs)
• “Temporal used by Stripe, Coinbase”: Not applicable (Vue context focuses on component APIs)

Working Example

<!-- ChildComponent.vue -->
<script setup>
const modelValue = defineModel<string>({ required: true });
</script>
<template>
  <input v-model="modelValue" />
</template>

// useTemplateRefs example
<script setup>
import { useTemplateRef } from 'vue';
const myElementRef = useTemplateRef<HTMLDivElement>('myDiv');
</script>
<template>
  <div ref="myDiv">Accessible element</div>
</template>

Practical Applications

• Use Case: defineModel in form components to reduce prop/emit boilerplate
• Pitfall: Forgetting to wrap array/object defaults in getters with withDefaults (causes runtime errors)

References:

• https://blog.vuejs.org/posts/vue-3-3#definemodel
• https://vuejs.org/api/composition-api-helpers.html#usetemplateref
• https://blog.vuejs.org/posts/vue-3-5#data-allow-mismatch

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