MCPInstall

angular-performance

by gentleman-programmingFrontend & Design

Angular performance: NgOptimizedImage, @defer, lazy loading, SSR. Trigger: When optimizing Angular app performance, images, or lazy loading.

Installs
350
Last 24h
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Trending rank
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Security
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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/gentleman-programming/gentleman-skills --skill angular-performance
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads angular-performance automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

NgOptimizedImage (REQUIRED for images)

import { NgOptimizedImage } from '@angular/common';

@Component({
  imports: [NgOptimizedImage],
  template: `
    <!-- LCP image: add priority -->
    <img ngSrc="hero.jpg" width="800" height="400" priority>
    
    <!-- Regular: lazy loaded by default -->
    <img ngSrc="thumb.jpg" width="200" height="200">
    
    <!-- Fill mode (parent needs position: relative) -->
    <img ngSrc="bg.jpg" fill>
    
    <!-- With placeholder -->
    <img ngSrc="photo.jpg" width="400" height="300" placeholder>
  `
})

Rules

  • ALWAYS set width and height (or fill)
  • Add priority to LCP (Largest Contentful Paint) image
  • Use ngSrc not src
  • Parent of fill image must have position: relative/fixed/absolute

@defer - Lazy Components

@defer (on viewport) {
  <heavy-component />
} @placeholder {
  <p>Placeholder shown immediately</p>
} @loading (minimum 200ms) {
  <spinner />
} @error {
  <p>Failed to load</p>
}

Triggers

TriggerWhen to Use
on viewportBelow the fold content
on interactionLoad on click/focus/hover
on idleLoad when browser is idle
on timer(500ms)Load after delay
when conditionLoad when expression is true
<!-- Multiple triggers -->
@defer (on viewport; on interaction) {
  <comments />
}

<!-- Conditional -->
@defer (when showComments()) {
  <comments />
}

Lazy Routes

// Single component
{
  path: 'admin',
  loadComponent: () => import('./features/admin/admin').then(c => c.AdminComponent)
}

// Feature with child routes
{
  path: 'users',
  loadChildren: () => import('./features/users/routes').then(m => m.USERS_ROUTES)
}

SSR & Hydration

bootstrapApplication(AppComponent, {
  providers: [
    provideClientHydration()
  ]
});
ScenarioUse
SEO critical (blog, e-commerce)SSR
Dashboard/AdminCSR
Static marketing siteSSG/Prerender

Slow Computations

SolutionWhen
Optimize algorithmFirst choice always
Pure pipesCache single result
MemoizationCache multiple results
computed()Derived signal state

NEVER trigger reflows/repaints in lifecycle hooks (ngOnInit, ngAfterViewInit).

Resources

FAQ

What does the angular-performance skill do?

Angular performance: NgOptimizedImage, @defer, lazy loading, SSR. Trigger: When optimizing Angular app performance, images, or lazy loading.

How do I install angular-performance?

Run npx skills add https://github.com/gentleman-programming/gentleman-skills --skill angular-performance in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/angular-performance/ (personal) or .claude/skills/angular-performance/ (project).

Which AI agents can use angular-performance?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is angular-performance safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains angular-performance?

It is published by gentleman-programming in gentleman-programming/gentleman-skills. It has 350 recorded installs.

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