- 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
3.7 KiB
3.7 KiB
title, impact, impactDescription, type, tags
| title | impact | impactDescription | type | tags | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Never Use .passive and .prevent Together | HIGH | Conflicting modifiers cause .prevent to be ignored and trigger browser warnings | gotcha |
|
Never Use .passive and .prevent Together
Impact: HIGH - The .passive modifier tells the browser you will NOT call preventDefault(), while .prevent does exactly that. Using them together causes .prevent to be ignored and triggers browser console warnings. This is a logical contradiction that leads to broken event handling.
Task Checklist
- Never combine
.passiveand.preventon the same event - Use
.passivefor scroll/touch events where you want better performance - Use
.preventwhen you need to stop the default browser action - If you need conditional prevention, handle it in JavaScript without
.passive
Incorrect:
<!-- WRONG: Conflicting modifiers -->
<template>
<div @scroll.passive.prevent="handleScroll">
<!-- .prevent will be IGNORED -->
<!-- Browser shows warning -->
</div>
</template>
<!-- WRONG: On touch events -->
<template>
<div @touchstart.passive.prevent="handleTouch">
<!-- Cannot prevent default - passive already promised not to -->
</div>
</template>
<!-- WRONG: On wheel events -->
<template>
<div @wheel.passive.prevent="handleWheel">
<!-- Broken: will scroll anyway despite .prevent -->
</div>
</template>
Correct:
<!-- CORRECT: Use .passive for performance (no prevention needed) -->
<template>
<div @scroll.passive="handleScroll">
<!-- Good for scroll tracking without blocking -->
</div>
</template>
<!-- CORRECT: Use .prevent when you need to prevent default -->
<template>
<form @submit.prevent="handleSubmit">
<!-- Correctly prevents form submission -->
</form>
</template>
<!-- CORRECT: For touch events where you need to prevent -->
<template>
<div @touchmove="handleTouchMove">
<!-- Handle prevention conditionally in JS -->
</div>
</template>
<script setup>
function handleTouchMove(event) {
if (shouldPreventScroll.value) {
event.preventDefault()
}
// ... handle touch
}
</script>
Understanding .passive
// .passive tells the browser:
// "I promise I won't call preventDefault()"
// This allows the browser to:
// 1. Start scrolling immediately without waiting for JS
// 2. Improve scroll performance, especially on mobile
// 3. Reduce jank and stuttering
// Equivalent to:
element.addEventListener('scroll', handler, { passive: true })
When to Use .passive
<!-- Good use cases for .passive -->
<!-- Scroll tracking analytics -->
<div @scroll.passive="trackScrollPosition">
<!-- Touch gesture detection (no prevention needed) -->
<div @touchmove.passive="detectGesture">
<!-- Wheel event monitoring -->
<div @wheel.passive="monitorWheel">
When to Use .prevent (Without .passive)
<!-- Good use cases for .prevent -->
<!-- Form submission -->
<form @submit.prevent="handleSubmit">
<!-- Link clicks with custom navigation -->
<a @click.prevent="navigate">
<!-- Preventing context menu -->
<div @contextmenu.prevent="showCustomMenu">
Browser Warning
When you combine .passive and .prevent, the browser console shows:
[Intervention] Unable to preventDefault inside passive event listener
due to target being treated as passive.