Create a ListItem in another site using the REST API

CreateListItemInAnotherSite.js

(async function() {

function getFailedResponseData(response) {
    return new Promise( async (resolve) => {

        const ct = response.headers.get("Content-Type") || "";
        let data = {};
        if (ct.match("application/json")) {
            data = await response.json();
        } else {
            data = {
                "odata.error": {
                    "code": `0x8000FFFF, E_UNEXPECTED, httpStatus(${response.status}${response.statusText ? ", " + response.statusText : ""})`,
                    "message": {
                        "lang": "en-us",
                        "value": await response.text()
                    }
                }
            }
        }
        resolve(data);

    });
}

function getSiteContextInfo(siteUrl) {
    return new Promise( async (resolve, reject) => {

        const url = `${siteUrl}/_api/contextinfo`;
        const response = await fetch(url, {
            "credentials": "include",
            "method": "POST",
            "headers": {
                "Accept": "application/json;odata=nometadata",
                "Cache-Control": "no-cache"
            },
        });

        if (response.ok) {
            const data = await response.json();
            resolve({
                "formDigest": data.FormDigestValue || "",
                "webFullUrl": `${data.WebFullUrl}`
            });
        } else {
            let data = await getFailedResponseData(response);
            reject(data);
        }

    });
}
function addEDMSOperation(siteContext, opRequest) {
    return new Promise( async (resolve, reject) => {

        const body = {
            "Title": opRequest.EDMSTargetItemUrl || "",
            "EDMSTargetSiteUrl": opRequest.EDMSTargetSiteUrl || "",
            "EDMSTargetSiteId": opRequest.EDMSTargetSiteId || "",
            "EDMSTargetWebId": opRequest.EDMSTargetWebId || "",
            "EDMSTargetListId": opRequest.EDMSTargetListId || "",
            "EDMSTargetItemId": opRequest.EDMSTargetItemId || "",
            "EDMSAction": opRequest.EDMSAction || "",
            "EDMSOperationStatus": "Pending",
            "EDMSOperationOutcome": "Pending"
        };
        const url = `${siteContext.webFullUrl}/_api/web/lists/GetByTitle('EDMS Transactions')/items`;
        const response = await fetch(url, {
            "credentials": "include",
            "method": "POST",
            "headers": {
                "X-RequestDigest": `${siteContext.formDigest}`,
                "Accept": "application/json;odata=nometadata",
                "Content-Type": "application/json;odata=nometadata",
                "Cache-Control": "no-cache"
            },
            "body": JSON.stringify(body)
        });

        if (response.ok) {
            const data = await response.json();
            resolve(data);
        } else {
            let data = await getFailedResponseData(response);
            reject(data);
        }
    });
}

let siteContext = null;
const otherSiteUrl = "https://platinumdogsconsulting.sharepoint.com/sites/hubsitetest";
//const otherSiteUrl = "https://platinumdogsconsulting.sharepoint.com/sites/audiotonix";
try {
    siteContext = await getSiteContextInfo(otherSiteUrl);
    console.log(`CONTEXTINFO site: ${siteContext.webFullUrl}`);
    console.log(`CONTEXTINFO digest: ${siteContext.formDigest}`);
} catch(e) {
    console.warn(`ERROR GETTING CONTEXTINFO for [${otherSiteUrl}]: `, e);
}

if (siteContext) {
    try {
        //"https://platinumdogsconsulting.sharepoint.com/sites/hubsitetest/Lists/EDMS%20Transactions/AllItems.aspx"
        const opRequest = {
            "EDMSTargetItemUrl": `${window.location.href}`,
            "EDMSTargetSiteUrl": `${_spPageContextInfo.webServerRelativeUrl}`,
            "EDMSTargetSiteId": `${_spPageContextInfo.siteId.replace(/[\{\}]*/gi, '')}`,
            "EDMSTargetWebId": `${_spPageContextInfo.webId.replace(/[\{\}]*/gi, '')}`,
            "EDMSTargetListId": `${_spPageContextInfo.listId.replace(/[\{\}]*/gi, '')}`,
            "EDMSTargetItemId": `${_spPageContextInfo.pageItemId}`,
            "EDMSAction": "Close"
        }

        const opData = await addEDMSOperation(siteContext, opRequest);
        console.log(`ADDEDMSOPERATION at ${siteContext.webFullUrl}`, opData);
    } catch(e) {
        console.warn(`ERROR CALLING ADDEDMSOPERATION for [${siteContext.webFullUrl}]: `, e);
    }
}


})();