javascript - 我不能将静态值添加到 native javascript Promise 中吗？

Question

我正在遍历对象数组以构建我想要并行等待的 Promise 集合。我需要一个特定的属性(与 promise 无关)来保留结果，但我不能只将它添加为 Promise 的属性，当 promise 解析时它会被删除:

let arrayOPromises = someArrayOfValues.map((promiseParams) => {
   let response = someFunctionThatReturnsAPromise(promiseParams);
   response.valueINeedToPersist = promiseParams.objectPropertyINeed; //unique to each iteration of map()
   return response;
});

await Promise.all(arrayOPromises);

// gives me the resolved promises, but not the added value

// [resolvedPromise1, resolvedPromise2];

// resolvedPromise1.valueINeedToPersist === 'undefined'

Answer 1

I need a specific property (unrelated to the promise) to persist in the result

是的，然后将其添加到结果中而不是添加到 promise 对象中:

const arrayOPromises = someArrayOfValues.map(async (promiseParams, objectPropertyINeed) => {
   const response = await someFunctionThatReturnsAPromise(promiseParams);
//                  ^^^^^
   response.valueINeedToPersist = objectPropertyINeed;
   return response;
});

await Promise.all(arrayOPromises);