n-alert

name	n-alert
description	Alert component for displaying important messages and notifications. Invoke when user needs to show contextual feedback messages with different types and styles in Naive UI.
metadata	{"author":"jiaiyan","version":"1.0.0"}

Naive UI Alert Component

Alert component for displaying important messages, warnings, and contextual feedback to users.

When to Use

Use this component when:

• System notifications: Display system-level messages like maintenance alerts
• Form feedback: Show validation errors or success messages
• Contextual warnings: Alert users about important information related to current content
• Dismissible messages: Display messages that users can close

When to Invoke

Invoke this skill when:

• User needs to display alert messages with different types (info, success, warning, error)
• User wants to create closable alerts
• User needs to customize alert icons
• User wants to create bordered or borderless alerts
• User asks about integrating alerts with marquee effects

Features

• Multiple Types: default, info, success, warning, error
• Closable: Optional close button with callback support
• Custom Icons: Support for custom icon slots
• Border Control: Toggle border visibility
• Header Slot: Custom header content support
• Marquee Integration: Works with n-marquee for scrolling content

API Reference

Alert Props

Name	Type	Default	Description
bordered	boolean	true	Whether the alert can show border.
closable	boolean	false	Whether the alert can be closed.
show-icon	boolean	true	Whether to show the icon of alert.
title	string	undefined	Title of the alert.
type	'default' | 'info' | 'success' | 'warning' | 'error'	'default'	Alert type.
on-after-leave	Function	undefined	Callback function executed when the alert disappears.
on-close	() => boolean | Promise<boolean> | any	() => true	The callback function executed when the close icon is clicked.

Alert Slots

Name	Parameters	Description
default	()	The content of the alert.
header	()	The content placed in the alert header.
icon	()	Icon displayed in the alert.

Basic Usage

Basic Alert Types

<template>
  <n-space vertical :size="12">
    <n-alert title="Default Text" type="default">
      Default alert content
    </n-alert>
    <n-alert title="Info" type="info">
      Information message
    </n-alert>
    <n-alert title="Success" type="success">
      Operation completed successfully
    </n-alert>
    <n-alert title="Warning" type="warning">
      Please review before proceeding
    </n-alert>
    <n-alert title="Error" type="error">
      Something went wrong
    </n-alert>
  </n-space>
</template>

Closable Alert

<template>
  <n-alert title="Dismissible" type="info" closable>
    This alert can be closed by clicking the X button
  </n-alert>
</template>

Custom Icon

<template>
  <n-alert title="Custom Icon" type="info">
    <template #icon>
      <n-icon>
        <IosAirplane />
      </n-icon>
    </template>
    Alert with custom icon
  </n-alert>
</template>

No Icon

<template>
  <n-alert :show-icon="false">
    Alert without icon
  </n-alert>
</template>

Bordered Toggle

<template>
  <n-space vertical :size="12">
    <n-switch v-model:value="bordered" />
    <n-alert title="Bordered Alert" type="info" :bordered="bordered">
      Toggle border visibility
    </n-alert>
  </n-space>
</template>

<script setup>
import { ref } from 'vue'

const bordered = ref(true)
</script>

With Marquee

<template>
  <n-alert type="error" title="Warning">
    <n-marquee>
      <div style="margin-right: 64px">
        Test environment is offline again.
      </div>
    </n-marquee>
  </n-alert>
</template>

Common Patterns

Form Validation Feedback

<template>
  <n-form>
    <n-alert v-if="errors.length" type="error" title="Validation Errors" closable>
      <n-ul>
        <n-li v-for="error in errors" :key="error">
          {{ error }}
        </n-li>
      </n-ul>
    </n-alert>
  </n-form>
</template>

<script setup>
import { ref } from 'vue'

const errors = ref(['Name is required', 'Email is invalid'])
</script>

Conditional Alert Display

<template>
  <n-alert 
    v-if="showAlert" 
    :type="alertType" 
    :title="alertTitle"
    closable
    @close="showAlert = false"
  >
    {{ alertMessage }}
  </n-alert>
</template>

<script setup>
import { ref } from 'vue'

const showAlert = ref(true)
const alertType = ref('success')
const alertTitle = ref('Success')
const alertMessage = ref('Operation completed successfully')
</script>

Custom Header

<template>
  <n-alert type="warning">
    <template #header>
      <n-space align="center">
        <n-icon><WarningIcon /></n-icon>
        <span>Custom Header</span>
      </n-space>
    </template>
    Alert content with custom header
  </n-alert>
</template>

Best Practices

1. Use appropriate types: Match alert type to message context

   • info for informational messages
   • success for positive confirmations
   • warning for cautionary messages
   • error for error states

2. Keep messages concise: Alert messages should be brief and actionable

3. Use closable for non-critical alerts: Allow users to dismiss informational alerts

4. Provide clear titles: Use descriptive titles to quickly convey the alert's purpose

5. Consider accessibility: Ensure alert content is accessible to screen readers