harmony 鸿蒙验证示例代码同源–异常场景4

2025-06-12
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验证示例代码同源–异常场景4

ID无嵌套，代码不一致

代码不一致（docs中只有结束的”`）

const promise: Promise<number> = new Promise((resolve: Function, reject: Function) => { setTimeout(() => { const randomNumber: number = Math.random(); if (randomNumber > 0.5) { resolve(randomNumber); } else { reject(new Error(‘Random number is too small’)); } }, 1000); })

<!--@[Start promise_async_operation](https://gitee.com/openharmony/applications_app_samples/blob/master/code/DocsSample/ArkTs/ArkTsConcurrent/MultithreadedConcurrency/MultiThreadConcurrencyOverview/entry/src/main/ets/pages/Index.ets)-->


代码不一致（docs中只有开始的```）

嵌套的ID，docs中不含嵌套部分

import { BusinessError } from '@kit.BasicServicesKit';



promise.then((result: number) => {
  console.info(`Random number is ${result}`);
}).catch((error: BusinessError) => {
  console.error(error.message);
});

注释不一致（docs：行上 vs Sample:行），代码内容一致

async function myAsyncFunction(): Promise<string> {
    const result: string = await new Promise((resolve: Function) => {
    setTimeout(() => {
        resolve('Hello, world!');
    }, 3000);
    });
    // 输出： Hello, world!
    console.info(result); 
    return result;
}

@Entry
@Component
struct PromiseAsyncAwait {
    @State message: string = 'Hello World';

    build() {
    Row() {
        Column() {
        Text(this.message)
            .fontSize(50)
            .fontWeight(FontWeight.Bold)
            .onClick(async () => {
            let res = await myAsyncFunction();
            console.info('res is: ' + res);
            })
        }
        .width('100%')
    }
    .height('100%')
    }
}

sample代码，start和end未同时出现

const promise: Promise<number> = new Promise((resolve: Function, reject: Function) => {
  setTimeout(() => {
    const randomNumber: number = Math.random();
    if (randomNumber > 0.5) {
      resolve(randomNumber);
    } else {
      reject(new Error('Random number is too small'));
    }
  }, 1000);
})

async function myAsyncFunction(): Promise<string> {
  const result: string = await new Promise((resolve: Function) => {
  });
  console.info(result); // 输出： Hello, world!
  return result;
}

@Entry
@Component
struct PromiseAsyncAwait {
  @State message: string = 'Hello World';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .onClick(async () => {
            let res = await myAsyncFunction();
            console.info('res is: ' + res);
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}