Angular2: replace host element with component's template

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I\'m new to angular in general and to angular2 specifically. I\'m trying to write a container component, which should have child components in it.

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5条回答

野的像风

2021-01-30 17:52

New angular versions have really cool directive, which may be used also for your use case. Tadaa: NgComponentOutlet. Happy coding ;)

Example:

@Component({selector: 'hello-world', template: 'Hello World!'})
class HelloWorld {
}

@Component({
  selector: 'ng-component-outlet-simple-example',
  template: `<ng-container *ngComponentOutlet="HelloWorld"></ng-container>`
})
class NgTemplateOutletSimpleExample {
  // This field is necessary to expose HelloWorld to the template.
  HelloWorld = HelloWorld;
}

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闹比i

2021-01-30 17:55

This you should get what you want:

@Component({
  selector: 'ul[my-list]',
  template: `
    <ng-content></ng-content>
  `
})
export class MyList {
}

@Component({
  selector: 'li[my-item]',
  template: `
    <ng-content></ng-content>
  `
})
export class MyItem {
...
}

<ul my-list>
    <li my-item>One</li my-item>
    <li my-item>Two</li my-item>
</ul my-list>

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迷失自我

2021-01-30 18:00
There is a hacky workaround solution that may not be supported in older browser versions, but it was working for mine project and I think it is quite easy to integrate without changing or adding a lot of code.

First you need to change selector of MyItem class/component from element selector
```
selector: 'custom-element-name'
```
to attribute selector
```
selector: '[customAttributeName]'
```
and finally use html slot element to wrap MyItem inside MyList html template
```
<slot customAttributeName></slot>
```
Full code:
```
import { Component } from 'angular2/core'

@Component({
  selector: 'my-list',
  template: `
    <ul>
      <slot myItemAsAtribute></slot>
    </ul>
  `
})
export class MyList {
}


@Component({
  selector: '[myItemAsAtribute]',
  template: `
      <li *ngFor="let item of items">{{item}}</li>

  `
})
export class MyItem {
}
```
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天涯浪人

2021-01-30 18:05

Finally I found solution: injecting ElementRef to MyItem and using its nativeElement.innerHTML:

MyList:

import { Component, ContentChildren, QueryList } from 'angular2/core'
import { MyItem } from './myitem'

@Component({
  selector: 'my-list',
  template: `
    <ul>
      <li *ngFor="#item of items" [innerHTML]="item.innerHTML"></li>
    </ul>
  `
})
export class MyList {
  @ContentChildren(MyItem) items: QueryList<MyItem>
}

MyItem:

import { Directive, Inject, ElementRef } from 'angular2/core'

@Directive({selector: 'my-item'})
export class MyItem {
  constructor(@Inject(ElementRef) element: ElementRef) {
    this.innerHTML = element.nativeElement.innerHTML
  }
}

Working plunk is here

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-上瘾入骨i

2021-01-30 18:08

In the latest angular you can even avoid adding <ng-content></ng-content>

I've applied is like:

import {Component} from '@angular/core';

@Component({
    selector: 'div[app-root]',
    templateUrl: 'app.component.html',
    styleUrls: ['app.component.css']
})
export class AppComponent {
    title = 'Delegates Presence Reporting';
}

and the template:

<div class="centered">
<h1>{{title}}</h1>
</div>

index.html

<body>
<div app-root></div>
</body>

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