The document discusses using Angular Schematics to simplify development tasks. It covers creating a basic schematic, adding templates, testing schematics, publishing to NPM, and integrating with Angular CLI. Schematics can generate code and files and are useful for tasks like authentication, routing, and application shell generation. The document provides examples of building schematics that generate components and applications.
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A Gentle Introduction to Angular Schematics - Devoxx Belgium 2019
1. Use Angular Schematics to Simplify Your Life
November 7, 2019
Matt Raible | @mraible
Photo by Trish McGinity mcginityphoto.com
2. Blogger on raibledesigns.com and
developer.okta.com/blog
Web Developer and Java Champion
Father, Husband, Skier, Mountain
Biker, Whitewater Rafter
Open Source Connoisseur
Hi, I’m Matt Raible!
Bus Lover
Okta Developer Advocate
6. Agenda
1. What are Angular Schematics?
2. Create and Test a Schematic
3. Schematic Templates
4. Template Expression Language
5. OpenID Connect Authentication
6. Schematics for React, Vue, and Ionic
21. Run Your Schematic with Angular CLI
$ npm pack
$ ng new my-test-app --routing --style css
$ cd my-test-app
$ npm install ../my-component/my-component-0.0.0.tgz
$ ng g my-component:my-component
22. Publish Your Schematic to npm
22
By default, .npmignore ignores all TypeScript files
Modify .npmignore so it doesn't exclude your template files!
Run npm publish
23. Add Support for ng add with Angular CLI
23
{
"$schema": "../node_modules/@angular-devkit/schematics/collection-schema.json",
"schematics": {
"my-component": {
"description": "A blank schematic.",
"factory": "./my-component/index#myComponent",
"schema": "./my-component/schema.json"
},
"ng-add": {
"factory": "./ng-add/index",
"description": "Add schematic",
"schema": "./my-component/schema.json"
}
}
}
24. Add Support for ng add with Angular CLI
24
import { chain, Rule, schematic, SchematicContext, Tree, }
from '@angular-devkit/schematics';
export default function (options: any): Rule {
return (host: Tree, context: SchematicContext) => {
return chain([
schematic('my-component', options)
])(host, context);
};
}
25. Template Expression Language
Placeholder Description
<%= expression %>
Replaced with the result of the call of the given expression. This only supports
direct expressions, no structural (for/if/...) JavaScript.
<%- expression %>
Same as above, but the value of the result will be escaped for HTML when
inserted (i.e. replacing '<' with '<')
<% inline code %>
Inserts the given code into the template structure, allowing to insert structural
JavaScript.
<%# text %> A comment, which gets entirely dropped.
https://www.npmjs.com/package/@angular-devkit/schematics#content-templating
26. Example Template Code
import { Injectable } from '@angular/core';
<% if (platform === 'cordova') { %>
import { CordovaBrowser } from 'ionic-appauth/lib/cordova';
<% } else { %>
import { CapacitorBrowser } from 'ionic-appauth/lib/capacitor';
<% } %>
@Injectable({
providedIn: 'root'
})
export class BrowserService extends
<%= (platform === 'cordova') ? 'CordovaBrowser' : 'CapacitorBrowser' %> {
}
27. Secure Your Angular App in Minutes!
$ ng new my-secure-app --routing
$ cd my-secure-app
// create a SPA app on Okta, copy settings
$ ng add @oktadev/schematics