@nutui/nutui-react/dist/es/utils/is-promise.js

京东风格的轻量级移动端 React 组件库，支持一套代码生成 H5 和小程序

import { isObject } from "./is-object";
import { isFunction } from "./is-function";
export var isPromise = function(val) {
    return isObject(val) && isFunction(val.then) && isFunction(val.catch);
};