I'm using Angular-CLI and working with ES6 modules and imports for the first time and I'm having a hard time understanding them. I basically started a new project with 'ng new Angular2Facebook' then `ng g component Login'. That created this structure:
dist
app
components
login
node_modules
src
app
components
login
login.ts
angular2-facebook.ts
app.ts
I finally figured out to use a relative path to the component for importing my own components to avoid compile errors:
import {Login} from './components/login/login'; // error
Since I no longer get compile errors, I'm pretty sure it's the right place, but the <login>
in my angular2-facebook view is not getting replaced with the template. In fact, the generated login.js is not being executed. If I go to my main app.ts file and import it, still nothing. If I add this:
console.dir(new Login());
Then I can see the file is loaded because 'exported class "Login"' is displayed in the console, but still the tags don't get replaced by the template. Here's Login.ts:
import {Component} from 'angular2/core';
@Component({
selector: 'login',
//templateUrl: 'app/components/login/login.html',
template: '<h1>LOGIN TEMPLATE</h1>',
styleUrls: ['app/components/login/login.css'],
providers: [],
directives: [],
pipes: []
})
export class Login {
constructor() {
console.log("Login constructor()");
}
}
console.log('exported class "Login"');
And angular2-facebook.ts which is always ran:
import {Component} from 'angular2/core';
import {Login} from './components/login/login';
import {FacebookTest1} from './components/facebook-test1/facebook-test1';
@Component({
selector: 'angular2-facebook-app',
providers: [],
templateUrl: 'app/angular2-facebook.html',
directives: [],
pipes: []
})
export class Angular2FacebookApp {
defaultMeaning: number = 42;
meaningOfLife(meaning) {
return `The meaning of life is ${meaning || this.defaultMeaning}`;
}
}
console.log('ran angular2-facebook.ts');
And angular2-facebook.html which is getting bound by angular, but which doesn't have the login of facebook-test1 tags being replaced:
<p>
{{meaningOfLife()}} ({{defaultMeaning}})
</p>
<login>Inside login tags</login>
<facebook-test1>Inside facebook-test1 tags</facebook-test1>
What I would really like is some kind of tutorial or book I could read to understand what is going on under the hood so I could debug these things myself, I just don't understand why it wouldn't be using my component. If I put <login>Loading...</login>
in the html page instead of the facebook app component and bootstrap it, it displays fine:
//bootstrap(Angular2FacebookApp);
bootstrap(Login);
Add the Login
component to your list of Directives
in your Angular2FacebookApp
component.
@Component({
selector: 'angular2-facebook-app',
providers: [],
templateUrl: 'app/angular2-facebook.html',
directives: [Login],
pipes: []
})
This tells angular to replace the <login>
tag with an instance of your component.
Without this angular doesn't know that it needs to replace this tag.
In this link of Angular2
web https://angular.io/docs/ts/latest/tutorial/toh-pt3.html# you can see that adding directives: [...ClassName]
inside of @Components
for example:
import {Component} from 'angular2/core';
import {Login} from './components/login/login';
import {FacebookTest1} from './components/facebook-test1/facebook-test1';
@Component({
selector: 'angular2-facebook-app',
providers: [],
templateUrl: 'app/angular2-facebook.html',
directives: [Login],
pipes: []
})
//Rest of code
you can watch the file name app.appcomponet.ts
for more details, hopefully help.
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