12451 b553c4e519 feat: API 统一 + 设备详情补全 + H5 导航优化
- API 路由统一: 移除 /api/h5/,统一 /api/pms/ 入口
- 二进制改名: api-server -> pms-api(与服务名一致)
- nginx: 合并 /api/ + /pms/api/ 为 /api/pms/
- 新增 docs/API.md 接口文档
- 后端: CabinetDetail 增加 rssi/pow_fail/address/soc 等字段
- Redis 管道批量读取仓体实时数据(SOC/电压/电流/功率)
- DB: 所有 TIMESTAMP 列改为 DATETIME(修复类型不匹配)
- 用户管理: 新增创建时间/修改时间列,状态改用 Switch
- 角色管理/用户管理: 操作按钮改为图标
- PC 设备详情: 基本信息补全 RSSI/ICCID/电源/地址
- PC 卡片: 通道统计改用 Lucide 图标,颜色统一
- PC 二维码: canvas 渲染,含编号文字,支持右键下载
- H5: 按 uni-app 规范修正导航(navigateTo 替代 reLaunch)
- H5: 详情页加返回导航条
- H5: 扫码支持摄像头(jsQR)+ ?id= 参数
- H5: 底部 tabBar 在所有页面常显
- H5: 首页统计改为 6 项(设备/通道/空闲/充电/充满/故障)
- H5: 下拉刷新 / 上拉加载
- 产品首页: 添加业务联系
- 文档: 清理过时文件,补充缺失规范章节
2026-07-04 04:03:02 +08:00

3.8 KiB

Fallthrough Attributes Overwrite Explicit Attributes in Vue 3

Rule

In Vue 3, fallthrough attributes overwrite explicitly set attributes on the root element (except class and style which are merged). This is a breaking change from Vue 2. To preserve explicit attribute values, use inheritAttrs: false and manually bind $attrs before the explicit attribute.

Why This Matters

  • Silent behavior change from Vue 2 to Vue 3
  • Can cause unexpected attribute values in migrated codebases
  • Only class and style merge intelligently; other attributes are overwritten
  • Affects component composition patterns and wrapper components

Bad Code

<!-- Parent.vue -->
<template>
  <Child msg="Passed from Parent" />
</template>

<!-- Child.vue - UNEXPECTED BEHAVIOR -->
<template>
  <GrandChild msg="Set in Child" />
</template>

<!--
  Vue 3 Result: GrandChild receives msg="Passed from Parent"
  The fallthrough attribute OVERWRITES the explicit one!

  Vue 2 Result: GrandChild receives msg="Set in Child"
  The explicit attribute took precedence
-->

Another common case with data attributes

<!-- Parent.vue -->
<template>
  <Button data-testid="parent-button" />
</template>

<!-- Button.vue - WRONG: explicit data-testid is overwritten -->
<template>
  <button data-testid="submit-btn">Submit</button>
</template>

<!-- Result: <button data-testid="parent-button">Submit</button> -->
<!-- The component's intended test ID is lost! -->

Good Code

Option 1: Control attribute order with inheritAttrs: false

<!-- Child.vue - CORRECT: Control attribute precedence -->
<script setup>
defineOptions({
  inheritAttrs: false
})
</script>

<template>
  <!-- v-bind="$attrs" FIRST, then explicit attribute -->
  <GrandChild v-bind="$attrs" msg="Set in Child" />
</template>

<!--
  Result: GrandChild receives msg="Set in Child"
  Explicit attribute overrides fallthrough because it comes last
-->

Option 2: Exclude specific attrs from fallthrough

<script setup>
import { computed, useAttrs } from 'vue'

defineOptions({
  inheritAttrs: false
})

const attrs = useAttrs()

// Filter out attributes you want to control explicitly
const filteredAttrs = computed(() => {
  const { msg, ...rest } = attrs
  return rest
})
</script>

<template>
  <GrandChild v-bind="filteredAttrs" msg="Set in Child" />
</template>

Option 3: For wrapper components, declare as prop

<!-- Button.vue - BEST: Declare attributes you need to control -->
<script setup>
const props = defineProps({
  dataTestid: {
    type: String,
    default: 'submit-btn'
  }
})

defineOptions({
  inheritAttrs: false
})
</script>

<template>
  <button :data-testid="dataTestid" v-bind="$attrs">
    <slot />
  </button>
</template>

Class and Style Are Special

Unlike other attributes, class and style merge rather than overwrite:

<!-- Parent.vue -->
<template>
  <Button class="large" style="color: red" />
</template>

<!-- Button.vue -->
<template>
  <button class="btn" style="padding: 10px">Submit</button>
</template>

<!--
  Result: <button class="btn large" style="padding: 10px; color: red">
  Both classes and styles are MERGED, not overwritten
-->

Vue 2 to Vue 3 Migration Checklist

When migrating components that rely on attribute precedence:

  1. Identify components that set explicit attributes on root elements
  2. Check if parent components pass the same attributes
  3. If explicit values should take precedence:
    • Add inheritAttrs: false
    • Use v-bind="$attrs" before explicit attributes

References