yeuimu
6c61a4e871
- Debian-based api image (bookworm-slim), docker/debian mirrors, prisma binaryTargets for openssl 3.0 - nginx: admin SPA under /admin, TLS via acme.sh (ZeroSSL) + auto-renewal cron, http->https redirect - prisma: add origin_goods.delisted migration, sync missing schema (good_image/tag_font_color/good_tags), fix users.createdAt Timestamptz - api: CORS wildcard reflection, helmet CORP cross-origin, price backfill in persistProductDetail, categoryIcon ancestor fallback, mediaByColor per-color gallery in public goods detail - admin: /admin base path (vite + router) - import-data.mjs: udt_name casting, serial sequence advance fix
73 lines
2.3 KiB
Markdown
73 lines
2.3 KiB
Markdown
---
|
|
title: Textarea Interpolation is One-Way Only - Use v-model for Two-Way Binding
|
|
impact: HIGH
|
|
impactDescription: Using {{ text }} inside textarea displays initial value but user input does NOT update the ref
|
|
type: capability
|
|
tags: [vue3, v-model, forms, textarea, interpolation, template]
|
|
---
|
|
|
|
# Textarea Interpolation is One-Way Only - Use v-model for Two-Way Binding
|
|
|
|
**Impact: HIGH** - Interpolation in textarea (`{{ text }}`) provides one-way binding only - it displays the initial value but user input does NOT update the ref. This creates a confusing disconnect where the textarea shows content but edits are silently lost.
|
|
|
|
Unlike v-model which provides two-way binding, interpolation only renders the initial ref value into the textarea. When users type, the ref remains unchanged, making form submissions return stale data. Always use v-model for two-way binding in textareas.
|
|
|
|
## Task Checklist
|
|
|
|
- [ ] Never use interpolation inside textarea tags
|
|
- [ ] Always use v-model for textarea two-way binding
|
|
- [ ] Search codebase for `<textarea>{{` patterns that may be silently broken
|
|
- [ ] Add linting rules to catch this pattern if possible
|
|
|
|
**Incorrect:**
|
|
```html
|
|
<script setup>
|
|
import { ref } from 'vue'
|
|
|
|
const message = ref('Hello World')
|
|
</script>
|
|
|
|
<template>
|
|
<!-- WRONG: One-way binding only! Shows initial value but edits don't update ref -->
|
|
<textarea>{{ message }}</textarea>
|
|
|
|
<!-- Also WRONG: User can type but changes are lost -->
|
|
<textarea>{{ userBio }}</textarea>
|
|
|
|
<!-- The textarea displays content but ref never updates -->
|
|
</template>
|
|
```
|
|
|
|
**Correct:**
|
|
```html
|
|
<script setup>
|
|
import { ref } from 'vue'
|
|
|
|
const message = ref('Hello World')
|
|
</script>
|
|
|
|
<template>
|
|
<!-- CORRECT: Use v-model for textarea -->
|
|
<textarea v-model="message"></textarea>
|
|
|
|
<!-- For read-only display, still use v-model or :value -->
|
|
<textarea v-model="message" readonly></textarea>
|
|
|
|
<!-- Or one-way binding with :value -->
|
|
<textarea :value="message" readonly></textarea>
|
|
</template>
|
|
```
|
|
|
|
```html
|
|
<!-- With placeholder and other attributes -->
|
|
<textarea
|
|
v-model="message"
|
|
placeholder="Enter your message..."
|
|
rows="5"
|
|
maxlength="500"
|
|
></textarea>
|
|
```
|
|
|
|
## Reference
|
|
- [Vue.js Form Input Bindings - Multiline text](https://vuejs.org/guide/essentials/forms.html#multiline-text)
|