Angular Ui Patterns
Angular Ui Patterns is an design AI skill with a core value of Modern Angular UI patterns for loading states, error handling, and data display. It
helps developers solve real-world problems in the design domain, boosting
efficiency, automating repetitive tasks, and optimizing workflows.
Modern Angular UI patterns for loading states, error handling, and data display. Use when building UI components, handling async data, or managing component states.
Quick Facts
mkdir -p ./skills/angular-ui-patterns && curl -sfL https://raw.githubusercontent.com/sickn33/antigravity-awesome-skills/main/skills/angular-ui-patterns/SKILL.md -o ./skills/angular-ui-patterns/SKILL.mdRun in terminal / PowerShell. Requires curl (Unix) or PowerShell 5+ (Windows).
Skill Content
# Angular UI Patterns
Core Principles
1. **Never show stale UI** - Loading states only when actually loading
2. **Always surface errors** - Users must know when something fails
3. **Optimistic updates** - Make the UI feel instant
4. **Progressive disclosure** - Use `@defer` to show content as available
5. **Graceful degradation** - Partial data is better than no data
---
Loading State Patterns
The Golden Rule
**Show loading indicator ONLY when there's no data to display.**
@Component({
template: `
@if (error()) {
<app-error-state [error]="error()" (retry)="load()" />
} @else if (loading() && !items().length) {
<app-skeleton-list />
} @else if (!items().length) {
<app-empty-state message="No items found" />
} @else {
<app-item-list [items]="items()" />
}
`,
})
export class ItemListComponent {
private store = inject(ItemStore);
items = this.store.items;
loading = this.store.loading;
error = this.store.error;
}Loading State Decision Tree
Is there an error?
→ Yes: Show error state with retry option
→ No: Continue
Is it loading AND we have no data?
→ Yes: Show loading indicator (spinner/skeleton)
→ No: Continue
Do we have data?
→ Yes, with items: Show the data
→ Yes, but empty: Show empty state
→ No: Show loading (fallback)Skeleton vs Spinner
| Use Skeleton When | Use Spinner When |
| -------------------- | --------------------- |
| Known content shape | Unknown content shape |
| List/card layouts | Modal actions |
| Initial page load | Button submissions |
| Content placeholders | Inline operations |
---
Control Flow Patterns
@if/@else for Conditional Rendering
@if (user(); as user) {
<span>Welcome, {{ user.name }}</span>
} @else if (loading()) {
<app-spinner size="small" />
} @else {
<a routerLink="/login">Sign In</a>
}@for with Track
@for (item of items(); track item.id) {
<app-item-card [item]="item" (delete)="remove(item.id)" />
} @empty {
<app-empty-state
icon="inbox"
message="No items yet"
actionLabel="Create Item"
(action)="create()"
/>
}@defer for Progressive Loading
<!-- Critical content loads immediately -->
<app-header />
<app-hero-section />
<!-- Non-critical content deferred -->
@defer (on viewport) {
<app-comments [postId]="postId()" />
} @placeholder {
<div class="h-32 bg-gray-100 animate-pulse"></div>
} @loading (minimum 200ms) {
<app-spinner />
} @error {
<app-error-state message="Failed to load comments" />
}---
Error Handling Patterns
Error Handling Hierarchy
1. Inline error (field-level) → Form validation errors
2. Toast notification → Recoverable errors, user can retry
3. Error banner → Page-level errors, data still partially usable
4. Full error screen → Unrecoverable, needs user actionAlways Show Errors
**CRITICAL: Never swallow errors silently.**
// CORRECT - Error always surfaced to user
@Component({...})
export class CreateItemComponent {
private store = inject(ItemStore);
private toast = inject(ToastService);
async create(data: CreateItemDto) {
try {
await this.store.create(data);
this.toast.success('Item created successfully');
this.router.navigate(['/items']);
} catch (error) {
console.error('createItem failed:', error);
this.toast.error('Failed to create item. Please try again.');
}
}
}
// WRONG - Error silently caught
async create(data: CreateItemDto) {
try {
await this.store.create(data);
} catch (error) {
console.error(error); // User sees nothing!
}
}Error State Component Pattern
@Component({
selector: "app-error-state",
standalone: true,
imports: [NgOptimizedImage],
template: `
<div class="error-state">
<img ngSrc="/assets/error-icon.svg" width="64" height="64" alt="" />
<h3>{{ title() }}</h3>
<p>{{ message() }🎯 Best For
- UI designers
- Product designers
- Claude users
- Designers
- Creative professionals
💡 Use Cases
- Generating component mockups
- Creating design system tokens
- Design system documentation
- Component specification creation
📖 How to Use This Skill
- 1
Install the Skill
Copy the install command from the Terminal tab and run it. The SKILL.md file downloads to your local skills directory.
- 2
Load into Your AI Assistant
Open Claude and reference the skill. Paste the SKILL.md content or use the system prompt tab.
- 3
Apply Angular Ui Patterns to Your Work
Provide context for your task — paste source material, describe your audience, or share existing work to guide the AI.
- 4
Review and Refine
Edit the AI output for accuracy, tone, and completeness. Add human insight where the AI lacks context.
❓ Frequently Asked Questions
Does this work with Figma?
Some design skills integrate with Figma plugins. Check the Works With section for supported tools.
Does Angular Ui Patterns generate production-ready design specs?
It generates detailed specifications that developers can use directly. Review and adjust for your specific design system.
How do I install Angular Ui Patterns?
Copy the install command from the Terminal tab and run it. The skill downloads to ./skills/angular-ui-patterns/SKILL.md, ready to use.
Can I customize this skill for my team?
Absolutely. Edit the SKILL.md file to add team-specific instructions, examples, or workflows.
⚠️ Common Mistakes to Avoid
Skipping usability testing
AI-generated designs should be validated with real users before development.
Not reading the full skill
Skills contain important context and edge cases beyond the quick start.