将数据从组件传递到指令

Question

I have following directive code:

import { Directive, Input, TemplateRef, ViewContainerRef } from '@angular/core';

@Directive({ selector: '[while]' })
export class WhileDirective {

constructor(private templateRef: TemplateRef<any>,
            private viewContainer: ViewContainerRef)
{ }

@Input() amountOfTeams: number;
@Input() counter:number;

@Input() set while(condition: boolean) {
        some logic....

    }
}

My component

import {Component, OnInit} from "@angular/core";
import {Game} from "../game";
import {PlayGameService} from "../playGame.service";


@Component({
    selector: "teams-Name",
    styleUrls:["teamsName.component.scss"],
    template: `<div  class='start-menu'>
<p  *while="" [amountOfTeams]="" [counter]=""></p>
</div>`

})

export class TeamsNameComponent {

    game: Game;
    counter:number = 0;

    constructor (public playGameService: PlayGameService) {}


    ngOnInit(){
        this.game = this.playGameService.getGame();
        console.log(this.game);
    }

}

I have loaded WhileDirective in declarations in my app.module.ts

Unfortunately I'm getting an error while compiling:

Uncaught Error: Template parse errors: Can't bind to 'amountOfTeams' since it isn't a known property of 'p'. (" ][amountOfTeams]="" [counter]="">

"): ng:///e/e.html@1:14 Can't bind to 'counter' since it isn't a known property of 'p'. (" ][counter]="">

Answer 1

The error that you're receiving is because you're trying to bind to a property of the p element which doesn't exist.

To pass information into your structural directive, enter your logic within the double quotes of your directive.

<p *while="some logic"></p>