Status Message Components

Vue 3 components for loading, error, success, and empty states.

When to Activate

Use this skill when the user:

• Says "create a loading spinner" or "show loading state"
• Asks "how to display empty state" or "no data UI"
• Mentions "toast notification", "success message", or "error popup"
• Wants to "implement status indicators"

Component Overview

Component	Purpose	Location
Toast	Success/error/warning messages	Toast.vue
Loading	Loading spinners and overlays	Loading.vue
EmptyState	No data placeholders	Create new
StatusBadge	Inline status indicators	Create new

---

1. Toast Notifications

Usage Patterns

Via Pinia Store (recommended):

import { useAppStore } from '@/stores/app'

const appStore = useAppStore()

// Success
appStore.showToast('操作成功', 'success')

// Error
appStore.showToast('操作失败，请重试', 'error')

// Warning
appStore.showToast('数据质量较低', 'warning', { duration: 5000 })

Component Structure

<template>
  <Teleport to="body">
    <Transition name="toast">
      <div v-if="visible" :class="['toast', `toast--${type}`]">
        <div class="toast__icon">{{ iconMap[type] }}</div>
        <div class="toast__content">
          <div v-if="title" class="toast__title">{{ title }}</div>
          <div class="toast__message">{{ message }}</div>
        </div>
        <button v-if="closable" class="toast__close" @click="close">×</button>
      </div>
    </Transition>
  </Teleport>
</template>

<script setup>
const props = defineProps({
  message: { type: String, required: true },
  title: { type: String, default: '' },
  type: { type: String, default: 'info' }, // success, error, warning, info
  duration: { type: Number, default: 3000 },
  closable: { type: Boolean, default: true }
})

const iconMap = {
  success: '✓',
  error: '✕',
  warning: '⚠',
  info: 'ℹ'
}
</script>

---

2. Loading States

Inline Loading

<template>
  <div class="data-section">
    <Loading v-if="isLoading" :visible="true" text="加载图表..." />
    <ChartView v-else :data="chartData" />
  </div>
</template>

Fullscreen Loading

<template>
  <Loading
    v-if="isRefreshing"
    :visible="true"
    text="正在刷新数据..."
    fullscreen
  />
</template>

Loading Component

<template>
  <div v-if="visible" :class="['loading', { 'loading--fullscreen': fullscreen }]">
    <div class="loading__backdrop"></div>
    <div class="loading__content">
      <div class="loading__spinner">
        <div class="loading__spinner-ring"></div>
        <div class="loading__spinner-ring"></div>
        <div class="loading__spinner-ring"></div>
      </div>
      <div v-if="text" class="loading__text">{{ text }}</div>
    </div>
  </div>
</template>

<script setup>
defineProps({
  visible: { type: Boolean, default: false },
  text: { type: String, default: '加载中...' },
  fullscreen: { type: Boolean, default: false }
})
</script>

---

3. Empty States

Component Template

<template>
  <div class="empty-state">
    <div class="empty-state__icon">{{ config.icon }}</div>
    <div class="empty-state__title">{{ config.title }}</div>
    <div class="empty-state__description">{{ config.description }}</div>
    <div class="empty-state__actions">
      <button
        v-for="action in config.actions"
        :key="action.text"
        :class="['btn', `btn--${action.type}`]"
        @click="action.handler"
      >
        {{ action.text }}
      </button>
    </div>
  </div>
</template>

<script setup>
const props = defineProps({
  type: {
    type: String,
    default: 'no-results',
    validator: v => ['no-results', 'no-data', 'error'].includes(v)
  }
})

const configs = {
  'no-results': {
    icon: '🔍',
    title: '未找到匹配数据',
    description: '请调整筛选条件',
    actions: [{ text: '重置筛选', type: 'primary' }]
  },
  'no-data': {
    icon: '📁',
    title: '暂无数据',
    description: '请先上传或刷新数据',
    actions: [
      { text: '上传数据', type: 'primary' },
      { text: '刷新', type: 'secondary' }
    ]
  },
  'error': {
    icon: '⚠️',
    title: '数据加载失败',
    description: '请检查网络连接或刷新重试',
    actions: [{ text: '重试', type: 'primary' }]
  }
}

const config = computed(() => configs[props.type])
</script>

Usage

<template>
  <div class="dashboard">
    <EmptyState v-if="data.length === 0" type="no-results" @reset-filters="handleReset" />
    <DataTable v-else :data="data" />
  </div>
</template>

---

4. Status Badges

Badge Component

<template>
  <span :class="['badge', `badge--${type}`]">
    <span class="badge__dot"></span>
    <span class="badge__text">{{ text }}</span>
  </span>
</template>

<script setup>
defineProps({
  type: {
    type: String,
    default: 'default',
    validator: v => ['success', 'warning', 'error', 'info', 'default'].includes(v)
  },
  text: { type: String, required: true }
})
</script>

<style scoped>
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: var(--text-sm);
}

.badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.badge--success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success-600);
}
.badge--success .badge__dot {
  background: var(--success-500);
}

/* ... other badge variants ... */
</style>

Usage

<StatusBadge type="success" text="优秀" />
<StatusBadge type="warning" text="警告" />
<StatusBadge type="error" text="错误" />

---

State Management Pattern

Pinia Store for Toast

// stores/app.js
export const useAppStore = defineStore('app', {
  state: () => ({
    toasts: []
  }),

  actions: {
    showToast(message, type = 'info', options = {}) {
      const toast = {
        id: Date.now(),
        message,
        type,
        title: options.title,
        duration: options.duration || 3000,
        closable: options.closable !== false
      }

      this.toasts.push(toast)

      // Auto remove after duration
      setTimeout(() => {
        this.removeToast(toast.id)
      }, toast.duration)
    },

    removeToast(id) {
      const index = this.toasts.findIndex(t => t.id === id)
      if (index > -1) {
        this.toasts.splice(index, 1)
      }
    }
  }
})

Render Toasts in App.vue

<template>
  <div class="toast-container">
    <Toast
      v-for="toast in appStore.toasts"
      :key="toast.id"
      v-bind="toast"
      @close="appStore.removeToast(toast.id)"
    />
  </div>
</template>

---

Best Practices

1. Loading States

• Show loading BEFORE API call starts
• Minimum display time: 300ms (avoid flashing)
• Use skeleton screens for better UX

2. Error Messages

• Always include recovery action
• Log errors to console for debugging
• Don't expose technical details to users

3. Success Messages

• Auto-dismiss after 2-3 seconds
• Use green color consistently
• Keep text brief (< 15 words)

4. Empty States

• Provide clear next steps
• Use friendly illustrations
• Distinguish "no results" vs "no data"

---

Troubleshooting

"Toast doesn't appear"

Check: Is Pinia store imported? Is Teleport target in DOM?

"Loading spinner blocks interaction"

Use pointer-events: auto on loading overlay

"Empty state shows briefly before data loads"

Add minimum delay or check data before rendering

---

Related Files

Existing Components:

• Toast.vue
• Loading.vue

Create These:

• EmptyState.vue
• StatusBadge.vue

Related Skills:

• ux-copywriting-standards - Write message text
• vue-component-dev - Component development patterns

---

Skill Version: v1.0 Created: 2025-11-09 Focuses On: Status UI components only