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interview-demo-code/.cursor/rules/vue.md
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# Vue.js 3 Rules
## Component Structure
### Template
```vue
<template>
<!-- Логическая структура -->
<div class="container">
<header>
<h2>{{ title }}</h2>
</header>
<main>
<DataTable :value="items" />
</main>
<footer>
<Button @click="handleSave">Save</Button>
</footer>
</div>
</template>
```
### Script Setup
```vue
<script setup>
// ✅ Всегда используй <script setup>
import { ref, computed, onMounted } from 'vue';
import DataTable from 'primevue/datatable';
import { apiGet } from '@/utils/http.js';
// Props
const props = defineProps({
title: {
type: String,
required: true
}
});
// Emits
const emit = defineEmits(['update', 'delete']);
// State
const items = ref([]);
const loading = ref(false);
// Computed
const totalItems = computed(() => items.value.length);
// Methods
async function loadItems() {
loading.value = true;
try {
const result = await apiGet('getItems');
items.value = result.data || [];
} finally {
loading.value = false;
}
}
// Lifecycle
onMounted(() => {
loadItems();
});
</script>
```
### Styles
```vue
<style scoped>
/* ✅ Используй scoped стили */
.container {
padding: 1rem;
}
/* ✅ Используй :deep() для доступа к дочерним компонентам */
:deep(.p-datatable) {
border: 1px solid #ccc;
}
</style>
```
## Component Naming
```vue
<!-- PascalCase для компонентов -->
<CustomerCard />
<ProductsList />
<OrderDetails />
<!-- kebab-case в шаблоне тоже работает -->
<customer-card />
```
## Props
```vue
<script setup>
// ✅ Всегда определяй типы и валидацию
const props = defineProps({
customerId: {
type: Number,
required: true,
validator: (value) => value > 0
},
showDetails: {
type: Boolean,
default: false
},
items: {
type: Array,
default: () => []
}
});
</script>
```
## Emits
```vue
<script setup>
// ✅ Определяй emits с типами
const emit = defineEmits<{
update: [id: number, data: object];
delete: [id: number];
cancel: [];
}>();
// ✅ Или с валидацией
const emit = defineEmits({
update: (id: number, data: object) => {
if (id > 0 && typeof data === 'object') {
return true;
}
console.warn('Invalid emit arguments');
return false;
}
});
</script>
```
## Reactive State
```vue
<script setup>
// ✅ ref для примитивов
const count = ref(0);
const name = ref('');
// ✅ ref для объектов (предпочтительно)
const customer = ref({
id: null,
name: '',
email: ''
});
// ✅ reactive только если нужно
import { reactive } from 'vue';
const state = reactive({
items: [],
loading: false
});
</script>
```
## Computed Properties
```vue
<script setup>
// ✅ Используй computed для производных значений
const filteredItems = computed(() => {
return items.value.filter(item => item.isActive);
});
// ✅ Computed с getter/setter
const fullName = computed({
get: () => `${firstName.value} ${lastName.value}`,
set: (value) => {
const parts = value.split(' ');
firstName.value = parts[0];
lastName.value = parts[1];
}
});
</script>
```
## Event Handlers
```vue
<template>
<!-- Используй kebab-case для событий -->
<Button @click="handleClick" />
<Input @input="handleInput" />
<Form @submit.prevent="handleSubmit" />
</template>
<script setup>
// ✅ Именуй обработчики с префиксом handle
function handleClick() {
// ...
}
function handleInput(event) {
// ...
}
function handleSubmit() {
// ...
}
</script>
```
## Conditional Rendering
```vue
<template>
<!-- Используй v-if для условного рендеринга -->
<div v-if="loading">
<LoadingSpinner />
</div>
<!-- v-show для частых переключений -->
<div v-show="hasItems">
<ItemsList :items="items" />
</div>
<!-- v-else для альтернатив -->
<div v-else>
<EmptyState />
</div>
</template>
```
## Lists
```vue
<template>
<!-- Всегда используй :key -->
<div v-for="item in items" :key="item.id">
{{ item.name }}
</div>
<!-- Для индексов -->
<div v-for="(item, index) in items" :key="`item-${index}`">
{{ item.name }}
</div>
</template>
```
## Form Handling
```vue
<template>
<form @submit.prevent="handleSubmit">
<!-- Используй v-model -->
<InputText v-model="form.name" />
<Textarea v-model="form.description" />
<!-- Для кастомных компонентов -->
<CustomInput v-model="form.email" />
</form>
</template>
<script setup>
const form = ref({
name: '',
description: '',
email: ''
});
function handleSubmit() {
// Валидация и отправка
}
</script>
```
## PrimeVue Components
```vue
<template>
<!-- Используй PrimeVue компоненты в админке -->
<DataTable
:value="customers"
:loading="loading"
paginator
:rows="20"
@page="onPage"
>
<Column field="name" header="Name" sortable />
</DataTable>
</template>
```
## Styling
```vue
<style scoped>
/* ✅ Используй scoped -->
.container {
padding: 1rem;
}
/* ✅ :deep() для дочерних компонентов */
:deep(.p-datatable) {
border: 1px solid #ccc;
}
/* ✅ :slotted() для слотов */
:slotted(.header) {
font-weight: bold;
}
</style>
```
## Composition Functions
```vue
<script setup>
// ✅ Выноси сложную логику в composables
import { useCustomers } from '@/composables/useCustomers.js';
const {
customers,
loading,
loadCustomers,
totalRecords
} = useCustomers();
onMounted(() => {
loadCustomers();
});
</script>
```
## Error Handling
```vue
<script setup>
import { useToast } from 'primevue';
const toast = useToast();
async function loadData() {
try {
const result = await apiGet('endpoint');
if (result.success) {
data.value = result.data;
} else {
toast.add({
severity: 'error',
summary: 'Ошибка',
detail: result.error
});
}
} catch (error) {
console.error('Error:', error);
toast.add({
severity: 'error',
summary: 'Ошибка',
detail: 'Не удалось загрузить данные'
});
}
}
</script>
```