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父组件向子组件传值 @Input
文件目录
父组件:
father.template.html
<h1>父组件</h1>
<cmt-child [data]='data'></cmt-child>
father.component.ts
import { Component, OnInit } from '@angular/core';
@Component({
selector: 'cmt-father',
templateUrl: './father.template.html'
})
export class FatherComponent implements OnInit {
data: any = '我是传往子组件的值'
ngOnInit() {
}
ngOnChanges() {
}
}
子组件:(使用@Input修饰器去接收)
childcomponent.ts
import { Component, OnInit, Input } from '@angular/core';
@Component({
selector: 'cmt-child',
templateUrl: './child.template.html'
})
export class ChildComponent implements OnInit {
@Input() data: any;//接收父组件的值
ngOnInit() {
console.log(this.data)
}
ngOnChanges() {
console.log(this.data)
}
}
这样就把值从父组件传到了子组件!
子组件向父组件传值(子组件通过方法借助修饰器@output传值给父组件)
子组件
childcomponent.ts
import { Component, OnInit, Input, Output, EventEmitter } from '@angular/core';
@Component({
selector: 'cmt-child',
templateUrl: './child.template.html'
})
export class ChildComponent implements OnInit {
@Output('checked') checkedBack = new EventEmitter<any>();
id:any ="我是传给父组件的值"
ngOnInit() {
}
ngOnChanges() {
}
checkedCallback() {
this.checkedBack.emit(this.id);
}
}
child.template.html.html
<h1>子组件</h1>
<button (click)='checkedCallback()'>点击传值给父组件</button>
父组件
father.template.html
<h1>父组件</h1>
<cmt-child (checked)="checkedBack($event)"></cmt-child>
father.component.ts
import { Component, OnInit } from '@angular/core';
@Component({
selector: 'cmt-father',
templateUrl: './father.template.html'
})
export class FatherComponent implements OnInit {
ngOnInit() {
}
ngOnChanges() {
}
checkedBack(event) {
console.log(event)
}
}
这样子组件通过点击就把值传递给了父组件!
发布者:全栈程序员栈长,转载请注明出处:https://javaforall.cn/141665.html原文链接:https://javaforall.cn