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Additions/52 lazy load component (tomalaforge#963)
* feat: create challenge 52 on lazy load component Initial boilerplate from `nx g @angular-challenges/cli:challenge` * feat: revert to NgModule Copy of 31 * feat: initial version of starting point * feat: add documentation * feat: pr tweaks Add author file Remove thomas from the contributor list Add a more direct hint * feat: pr tweaks Update "Go to the latest Challenge" link
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‎README.md‎

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## Challenges
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Check [all 51 challenges](https://angular-challenges.vercel.app/)
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Check [all 52 challenges](https://angular-challenges.vercel.app/)
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## Contributors ✨
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‎apps/angular/52-lazy-load-component/.eslintrc.json‎

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{
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"extends": ["../../../.eslintrc.json"],
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"ignorePatterns": ["!**/*"],
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"overrides": [
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{
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"files": ["*.ts"],
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"extends": [
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"plugin:@nx/angular",
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"plugin:@angular-eslint/template/process-inline-templates"
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],
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"rules": {
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"@angular-eslint/directive-selector": [
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"error",
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{
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"type": "attribute",
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"prefix": "app",
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"style": "camelCase"
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}
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],
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"@angular-eslint/component-selector": [
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"error",
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{
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"type": "element",
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"prefix": "app",
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"style": "kebab-case"
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}
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]
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}
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},
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{
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"files": ["*.html"],
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"extends": ["plugin:@nx/angular-template"],
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"rules": {}
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}
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]
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}

‎apps/angular/52-lazy-load-component/README.md‎

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# lazy-load-component
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> author: thomas-laforge
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### Run Application
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```bash
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npx nx serve angular-lazy-load-component
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```
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### Documentation and Instruction
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Challenge documentation is [here](https://angular-challenges.vercel.app/challenges/angular/52-lazy-load-component/).

‎apps/angular/52-lazy-load-component/jest.config.ts‎

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/* eslint-disable */
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export default {
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displayName: 'angular-lazy-load-component',
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preset: '../../../jest.preset.js',
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setupFilesAfterEnv: ['<rootDir>/src/test-setup.ts'],
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coverageDirectory: '../../../coverage/apps/angular/52-lazy-load-component',
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transform: {
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'^.+\\.(ts|mjs|js|html)$': [
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'jest-preset-angular',
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{
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tsconfig: '<rootDir>/tsconfig.spec.json',
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stringifyContentPathRegex: '\\.(html|svg)$',
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},
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],
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},
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transformIgnorePatterns: ['node_modules/(?!.*\\.mjs$)'],
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snapshotSerializers: [
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'jest-preset-angular/build/serializers/no-ng-attributes',
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'jest-preset-angular/build/serializers/ng-snapshot',
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'jest-preset-angular/build/serializers/html-comment',
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],
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};

‎apps/angular/52-lazy-load-component/project.json‎

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{
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"name": "angular-lazy-load-component",
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"$schema": "../../../node_modules/nx/schemas/project-schema.json",
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"projectType": "application",
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"prefix": "app",
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"sourceRoot": "apps/angular/52-lazy-load-component/src",
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"tags": [],
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"targets": {
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"build": {
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"executor": "@angular-devkit/build-angular:application",
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"outputs": ["{options.outputPath}"],
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"options": {
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"outputPath": "dist/apps/angular/52-lazy-load-component",
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"index": "apps/angular/52-lazy-load-component/src/index.html",
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"browser": "apps/angular/52-lazy-load-component/src/main.ts",
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"polyfills": ["zone.js"],
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"tsConfig": "apps/angular/52-lazy-load-component/tsconfig.app.json",
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"inlineStyleLanguage": "scss",
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"assets": [
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"apps/angular/52-lazy-load-component/src/favicon.ico",
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"apps/angular/52-lazy-load-component/src/assets"
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],
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"styles": ["apps/angular/52-lazy-load-component/src/styles.scss"],
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"scripts": []
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},
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"configurations": {
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"production": {
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"budgets": [
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{
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"type": "initial",
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"maximumWarning": "500kb",
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"maximumError": "1mb"
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},
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{
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"type": "anyComponentStyle",
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"maximumWarning": "2kb",
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"maximumError": "4kb"
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}
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],
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"outputHashing": "all"
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},
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"development": {
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"optimization": false,
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"extractLicenses": false,
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"sourceMap": true
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}
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},
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"defaultConfiguration": "production"
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},
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"serve": {
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"executor": "@angular-devkit/build-angular:dev-server",
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"configurations": {
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"production": {
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"buildTarget": "angular-lazy-load-component:build:production"
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},
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"development": {
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"buildTarget": "angular-lazy-load-component:build:development"
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}
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},
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"defaultConfiguration": "development"
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},
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"extract-i18n": {
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"executor": "@angular-devkit/build-angular:extract-i18n",
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"options": {
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"buildTarget": "angular-lazy-load-component:build"
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}
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},
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"lint": {
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"executor": "@nx/eslint:lint"
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},
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"test": {
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"executor": "@nx/jest:jest",
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"outputs": ["{workspaceRoot}/coverage/{projectRoot}"],
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"options": {
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"jestConfig": "apps/angular/52-lazy-load-component/jest.config.ts"
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}
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}
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}
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}

‎apps/angular/52-lazy-load-component/src/app/app.component.ts‎

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import { Component, signal } from '@angular/core';
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@Component({
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selector: 'app-root',
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template: `
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<div class="h-screen bg-gray-500">
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@if (topLoaded()) {
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<app-top />
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} @else {
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<app-placeholder />
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<button
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class="rounded-sm border border-blue-500 bg-blue-300 p-2"
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(click)="topLoaded.set(true)">
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Load Top
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</button>
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}
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</div>
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`,
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})
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export class AppComponent {
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topLoaded = signal(false);
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}

‎apps/angular/52-lazy-load-component/src/app/app.module.ts‎

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

‎apps/angular/52-lazy-load-component/src/app/placeholder.component.ts‎

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import { Component } from '@angular/core';
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@Component({
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selector: 'app-placeholder',
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template: `
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I'm a placeholder component.
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`,
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styles: `
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:host {
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display: grid;
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padding: 20px;
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background-color: #f0f0f0;
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height: 50%;
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}
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`,
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})
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export class PlaceholderComponent {}

‎apps/angular/52-lazy-load-component/src/app/top.component.ts‎

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import { Component } from '@angular/core';
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@Component({
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selector: 'app-top',
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template: `
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I am a very heavy, expensive component that should be lazy loaded.
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`,
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styles: `
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:host {
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display: grid;
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padding: 20px;
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background-color: #f0f0f0;
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height: 50%;
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}
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`,
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})
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export class TopComponent {}

‎apps/angular/52-lazy-load-component/src/assets/.gitkeep‎

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