topic description

the following code is commonly used on the Internet for fetch.js

sources of topics and their own ideas

some problems encountered in the code with async and await requests

related codes

/ / Please paste the code text below (do not replace the code with pictures)
import {baseUrl} from". / env"

export default async (url ="", data = {}, type = "GET", method =" fetch") = > {

type = type.toUpperCase();
url = baseUrl + url;

if (type == "GET") {
    let dataStr = ""; //
    Object.keys(data).forEach(key => {
        dataStr += key + "=" + data[key] + "&";
    })

    if (dataStr !== "") {
        dataStr = dataStr.substr(0, dataStr.lastIndexOf("&"));
        url = url + "?" + dataStr;
    }
}

if (window.fetch && method == "fetch") {
    let requestConfig = {
        credentials: "include",
        method: type,
        headers: {
            "Accept": "application/json",
            "Content-Type": "application/json"
        },
        mode: "cors",
        cache: "force-cache"
    }

    if (type == "POST") {
        Object.defineProperty(requestConfig, "body", {
            value: JSON.stringify(data)
        })
    }
    
    try {
        const response = await fetch(url, requestConfig);
        const responseJson = await response.json();
        return responseJson
    } catch (error) {
        throw new Error(error)
    }
} else {
    return new Promise((resolve, reject) => {
        let requestObj;
        if (window.XMLHttpRequest) {
            requestObj = new XMLHttpRequest();
        } else {
            requestObj = new ActiveXObject;
        }

        let sendData = "";
        if (type == "POST") {
            sendData = JSON.stringify(data);
        }

        requestObj.open(type, url, true);
        requestObj.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        requestObj.send(sendData);

        requestObj.onreadystatechange = () => {
            if (requestObj.readyState == 4) {
                if (requestObj.status == 200) {
                    let obj = requestObj.response
                    if (typeof obj !== "object") {
                        obj = JSON.parse(obj);
                    }
                    resolve(obj)
                } else {
                    reject(requestObj)
                }
            }
        }
    })
}

}

what result do you expect? What is the error message actually seen?

the interface address connection timed out, and even the parameters could not be passed