angular4输入属性(Input)

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Input 是输入属性,用来定义组件的内的输入属性，主要用来实现父组件想子组件传递数据

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import { Component, Input } from "@angular/core";

@Component({
    selector: 'dex-counter'
})
export class CounterComponent {

    // 变量
    _count: number = 0;
    biggerThanTen: boolean = false;

    constrcutor() {
    }

    // @Input('value') count: number = 0;

    // set
    @Input()
    set count(num: number) {
        this.biggerThanTen = num > 10;
        this._count = num;
    }

    get count():number {
        return this._count;
    }
}

ngOnChanges

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