1/* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16@Component 17@Entry 18struct ParentView { 19 @State counter:number = 0; 20 build() { 21 Column() { 22 ChildA({counterVal: this.counter}) 23 ChildB({counterRef: $counter}) 24 } 25 } 26} 27 28@Component 29struct ChildA { 30 @Prop counterVal: number; 31 build() { 32 Button() { 33 Text(`ChildA: (${this.counterVal}) +1`) 34 } 35 .onClick(() => this.counterVal += 1) 36 } 37} 38 39@Component 40struct ChildB { 41 @Link counterRef: number; 42 build() { 43 Button() { 44 Text(`ChildB: (${this.counterRef}) +1`) 45 } 46 .onClick(() => this.counterRef += 1) 47 } 48} 49