pass data to angular component code example
Example 1: angular send data to parent component
import { Component, Output, EventEmitter } from '@angular/core';
@Component({
selector: 'app-child',
template: `
<button (click)="sendMessage()">Send Message</button>
`,
styleUrls: ['./child.component.css']
})
export class ChildComponent {
message: string = "Hola Mundo!"
@Output() messageEvent = new EventEmitter<string>();
constructor() { }
sendMessage() {
this.messageEvent.emit(this.message)
}
}
Example 2: input property angular
//passing properties to child elements
<app-slider [title]="'This is a title'"> </app-slider>
//inside the component slider i add just before the constructor :
.
.
@input() title: string;
constructor(){
}
//after this we can use these new property inside the .html file of the component
<div id='slider' class='slider-big'>
<h1> {{title}}</h1>
</div>
Example 3: how to pass variable via component after it's updated angular
// you can try like this, here you want to get the data from the parent component to child component, Here your parent component is ParentComponent and child component is app-child so here for getting the data from parent to child we can use ngOnChanges(changes: SimpleChanges)
// ParentComponent.html
<app-child
[data]="data"
(filterEmmiter)="filter($event)">
</app-child>
// child.component.ts
import {Component, OnChanges, SimpleChanges, Input} from '@angular/core';
class Child implements OnInit, OnChanges {
@Input() Data: any; // here is the data variable which we are getting from the parent
constructor() {}
ngOnchanges(changes: SimpleChanges) {
console.log(changes); // here you will get the data from parent once the input param is change
}
}