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Angular component interaction two-way binding approaches


Angular component interaction two-way binding approaches

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Angular component interaction two-way binding approaches
Tag : angular , By : Brian Drum
Date : November 24 2020, 03:41 PM

I wish this helpful for you In your child component you have to implement two-way binding interface like this:
private _ipVar: any;
get ipVar(): any {
    return this._ipVar;
}
@Input()
set ipVar(value: any) {
    if(this._ipVar === value) {
        return;
    }
    this._ipVar = value;
    this.ipVarChange.emit(this._ipVar);
}
@Output()
ipVarChange = new EventEmitter<any>();
<childcomponent [(ipVar)]="ParentVar"></childcomponent>

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how to distinguish between value set by user interaction vs binding on a Spark input component


Tag : actionscript-3 , By : firebasket
Date : March 29 2020, 07:55 AM
may help you . How do I determine whether a value set comes from user interaction with the input component, or from binding? , listen for the change event. It will solve your problem.
<s:HGroup>
        <s:NumericStepper change="trace('ns change')" value="{ns2.value}" minimum="{ns2.minimum}" maximum="{ns2.maximum}"/>
        <s:NumericStepper minimum="0" maximum="1000" id="ns2" />
    </s:HGroup>

Component interaction in Angular 2 RC5


Tag : angular , By : S Hall
Date : March 29 2020, 07:55 AM
it should still fix some issue I want to create interaction between components which are not parents or children : they are in different NgModules. I imagined a service, where I inject my component, but it seems to not be possible. And I can't inject too my component in the other component (cause they are not parent/child). But they have a common parent (AppComponent). How could I do to make communicate my components ? , You definitely can use services. Something like that:
import { EventEmitter } from '@angular/core';

export class SharedService {
    pushedData = new EventEmitter<string>();
    private data: string[] = [];

    addData(input: string) {
        this.data.push(input);
    }

    getData() {
        return this.data;
    }

    pushData(value: string) {
        this.pushedData.emit(value);
    }
}

Component Interaction Angular 2


Tag : angular , By : cnemelka
Date : March 29 2020, 07:55 AM
wish of those help This is one way of doing it : load service in parent component and share it with all child
Parent Component
import { Svc } from '../services/mySvc.svc'
@Component({
.......
    providers: [Svc]
    template:`<child1></child1>
                <child2></child2>`
})
export class TerminalComponent implements OnInit {
import { Svc } from '../services/mySvc.svc'
@Component({
selector: 'child1',
......
})
export class Child1Component implements OnInit {
constructor(private _editCompSvc: Svc){}
}

import { Svc } from '../services/mySvc.svc'
@Component({
selector: 'child1',
......
})
export class Child2Component implements OnInit {
constructor(private _editCompSvc: Svc){}
}

Angular component interaction issue


Tag : angular , By : Chris Hubbard
Date : March 29 2020, 07:55 AM
will help you Remove the public keyword in both parent and child component.ts, it should work fine
  public name = "Vishwas"; // public not necessary 

  @Input() public parentData;  //public not necessary
<app-test *ngIf="name" [parentData]="name"></app-test>
 ngOnInit() {
  console.log(this.parentData);
 }

Sibling component interaction in angular 2


Tag : angular , By : David
Date : March 29 2020, 07:55 AM
To fix the issue you can do You need EventEmitter to emit the event on setdata() and subscribe that event to get that data :
Like this: you should call setdata() with data as parameter:
import { Injectable, Output, EventEmitter } from '@angular/core';
    @Injectable({
    providedIn: 'root'
     })
export class DataService{
      @Output() open: EventEmitter<any> = new EventEmitter();

    setdata(data){
    this.open.emit(data);
    }
}
constructor(private data: DataService) { }
functionCall(){
this.data.setdata(data);
}
constructor(private data: DataService) { }
    ngAfterViewInit() {
          this.data.changeClasss.subscribe(data => {
              this.yourData = data


                    });
    }
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