Uncaught (in promise) Error: JavaScript

The error message “Uncaught (in promise) Error: A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received” typically indicates that a promise was not resolved or rejected properly. This can occur if the asynchronous operation (like your database query) fails or if there is an issue with the event listener that is supposed to handle the response.

In your code, ensure that the sql.connect(config) and sql.query calls are functioning correctly. If the connection fails or the query does not return a result, it may lead to this error. Additionally, check if there are any unhandled promise rejections in your code. You can add a .catch() to your promise chain to handle any errors gracefully.

Here’s a modified version of your function with improved error handling:

async function getUserDetails(MemberID) {
    try {
        const config = {
            server: '.',
            database: 'WebForms',
            options: {
                //encrypt: true // Use this if you're on Azure
            }
        };

        await sql.connect(config);
        const result = await sql.query`SELECT RTRIM(LTRIM(CONCAT(COALESCE(FirstName + ' ', ''), COALESCE(LastName, '')))) AS MemberName, SSN FROM dbo.Members WHERE MemberID = ${MemberID}`;

        if (result.recordset.length > 0) {
            const { MemberName, SSN } = result.recordset[0];
            console.log(`Name: ${MemberName}, SSN: ${SSN}`);
            document.getElementById("membername").value = MemberName;
            document.getElementById("SSN").value = SSN;
        } else {
            console.log('No user found with the provided account number.');
            document.getElementById("membername").value = '';
            document.getElementById("SSN").value = '';
        }
    } catch (err) {
        console.error('SQL error', err);
    } finally {
        await sql.close();
    }
}

Make sure to test your database connection and query separately to isolate the issue. If the problem persists, consider checking your browser's console for additional clues or errors.

Hello Paul,

I wrapped the SQL query in a try-catch block, but it did not populate any error, the only error is the same: 

“Uncaught (in promise) Error: A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received”

This typeof issue occurs when there's an issue with communication between the main thread and a background script, web worker, or iframe.

Can you wrap the SQL query in a try-catch block to catch any SQL-specific errors.