Question

所以我有一个有趣的问题。以下是可以快速概括的方式：（1）通过基于python的API端点-属性从数据库获取属性值或列表（2）使用请求结果设置对象-customObject [“ customProperty”]。

在1和2之间，我需要等待请求返回值。我该如何实现？

function mainWrapperFunction() {
    var property = apiRequestFunction();
    // I need to wait for the result to return from the API request before going on
    customObject["customProperty"] = property;
}

Answer 1

您需要使用Promise。

async function mainWrapperFunction() {
    var property = await apiRequestFunction();
    // I need to wait for the result to return from the API request before going on
    customObject["customProperty'] = property;
}

需要从apiRequestFunction();函数返回一个承诺，如下所示-

function apiRequestFunction() {
  return new Promise(resolve => {
      resolve('Your value here');
  });
}

Answer 2

尝试：

async function mainWrapperFunction() {
    var property = await apiRequestFunction();
    // I need to wait for the result to return from the API request before going on
    customObject['customProperty'] = property;
}

有关asyc函数https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Instructions/async_function

的更多详细信息

在JavaScript中同步获取请求数据

2 个答案: