/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

@Component
@Entry
struct Parent {
    @State arr: number[] = [1, 2, 3]
    build() {
        Column() {
            Child({items: $arr})
            ForEach(this.arr,
                item => {Text(`${item}`)},
                item => item)
        }
    }
}

@Component
struct Child {
    @Link items: number[]
    build() {
        Column() {
            Button() {
                Text("Button1: push")
            }.onClick(() => {
                this.items.push(100)
            })
            Button() {
                Text("Button2: replace whole item")
            }.onClick(() => {
                this.items = [100, 200, 300]
            })
        }
    }
}