A Comprehensive Guide to Angular Compiler Options (2024)

Rakesh Mullassery

`strictTemplates`

The strictTemplates option enables strict template type checking, ensuring type safety within Angular templates. By enabling this option, Angular performs more rigorous checks during template compilation, helping catch potential errors at compile-time rather than runtime.

"angularCompilerOptions": {
 "strictTemplates": true
}

`fullTemplateTypeCheck`

Similar to strictTemplates, fullTemplateTypeCheck performs a comprehensive type check of Angular templates, including expressions used within templates. Enabling this option provides enhanced type safety but may result in longer compilation times, especially for large projects.

"angularCompilerOptions": {
 "fullTemplateTypeCheck": true
}

`enableIvy`

enableIvy allows developers to opt into using the Ivy renderer, the next-generation rendering engine for Angular. Ivy offers numerous benefits such as improved bundle size, faster compilation, and enhanced debugging capabilities. While Ivy is the default renderer starting from Angular 9, this option provides flexibility for projects migrating from older versions.

"angularCompilerOptions": {
 "enableIvy": true
}

`aot`

Ahead-of-Time (AOT) compilation improves application startup performance by pre-compiling Angular templates and components during the build process. Enabling aot option ensures that your application is compiled ahead of time, resulting in faster rendering and reduced bundle size.

"angularCompilerOptions": {
 "aot": true
}

`bundle`

The bundle option allows developers to specify whether Angular should generate a single bundled file (true) or separate files for each component (false). While bundling components individually may increase initial load time, it can improve caching and incremental builds for large applications.

"angularCompilerOptions": {
 "bundle": true
}

Angular Compiler Options provide developers with fine-grained control over the compilation process, enabling them to optimize performance, enhance type safety, and adopt advanced features such as Ivy rendering. By leveraging these options effectively, developers can build high-performance Angular applications that deliver exceptional user experiences.

As you embark on your Angular journey, take the time to experiment with different compiler options to discover the optimal configuration for your project’s needs. Combine these options with other best practices such as code splitting, lazy loading, and tree shaking to create fast, efficient, and maintainable Angular applications.

Happy coding!

// Sample component demonstrating usage of Angular Compiler Options
import { Component } from '@angular/core';@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 title = 'angular-compiler-options-demo';
 greeting: string = 'Hello, Angular!';
 numberArray: number[] = [1, 2, 3, 4, 5];
}

<!-- Sample template demonstrating usage of Angular Compiler Options -->
<h1>{{ title }}</h1>
<p>{{ greeting }}</p>
<ul>
 <li *ngFor="let number of numberArray">{{ number }}</li>
</ul>

// tsconfig.json
{
 "compilerOptions": {
 "strict": true,
 "module": "esnext",
 "target": "es5",
 "moduleResolution": "node",
 "esModuleInterop": true,
 "skipLibCheck": true,
 "forceConsistentCasingInFileNames": true,
 "declaration": false,
 "emitDecoratorMetadata": true,
 "experimentalDecorators": true,
 "noFallthroughCasesInSwitch": true,
 "noImplicitAny": true,
 "noUnusedLocals": true,
 "noUnusedParameters": true,
 "resolveJsonModule": true,
 "removeComments": true,
 "strictPropertyInitialization": false,
 "typeRoots": ["node_modules/@types"],
 "lib": ["es2018", "dom"]
 },
 "angularCompilerOptions": {
 "strictTemplates": true,
 "fullTemplateTypeCheck": true,
 "enableIvy": true,
 "aot": true,
 "bundle": true
 }
}

// app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';import { AppComponent } from './app.component';
@NgModule({
 declarations: [
 AppComponent
 ],
 imports: [
 BrowserModule
 ],
 providers: [],
 bootstrap: [AppComponent]
})
export class AppModule { }

// main.ts
import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';import { AppModule } from './app/app.module';
import { environment } from './environments/environment';
if (environment.production) {
 enableProdMode();
}
platformBrowserDynamic().bootstrapModule(AppModule)
 .catch(err => console.error(err));

/* app.component.css */
h1 {
 color: blue;
}p {
 font-size: 18px;
}
li {
 font-weight: bold;
}

<!-- index.html -->
<!doctype html>
<html lang="en">
<head>
 <meta charset="utf-8">
 <title>Angular Compiler Options Demo</title>
 <base href="/">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <link rel="icon" type="image/x-icon" href="favicon.ico">
</head>
<body>
 <app-root></app-root>
</body>
</html>

// environments/environment.ts
export const environment = {
 production: false
};

// environments/environment.prod.ts
export const environment = {
 production: true
};

# Sample command to run Angular application
ng serve --open

# Sample command to build Angular application
ng build --prod

# Sample command to enable Ivy renderer
ng serve --aot --enable-ivy

# Sample command to disable Ivy renderer
ng serve --aot --disable-ivy

# Sample command

A Comprehensive Guide to Angular Compiler Options (2024)

strictTemplates

fullTemplateTypeCheck

enableIvy

aot

bundle

References

`strictTemplates`

`fullTemplateTypeCheck`

`enableIvy`

`aot`

`bundle`