Explains the distinction between the MERN stack (React) and MEVN stack (Vue), and when choosing MERN makes sense.

This question compares the three leading JavaScript frameworks—Angular, React, and Vue—evaluating which is the best based on factors like popularity, performance, ecosystem, learning curve, and use cases.

In a React useEffect, I call an async function but forget to await or return it. If it throws, I get an unlogged rejection or erratic component behavior.

Functions with infinite recursion crash with “Maximum call stack exceeded,” but infinite loops using while(true) just hang/crash without stack errors. Why?

My debounced function isn’t acting on the latest input or has undefined variables—especially when the handler needs access to current input values.

Implementing autocomplete: users type fast, sending multiple fetch calls. Sometimes, results from an earlier request replace the newer ones, causing wrong suggestions to display.

Why doesn’t this wait, and how do I correctly handle async logic in loops?

I store Blob objects in IndexedDB and later retrieve them. In Chrome and Edge, this works across tabs and refreshes—even when accessed via indexes. In Safari, they sometimes fail or come back empty, especially with getAll() after reopening. What's ca...

Reading a large file in chunks via FileReader.readAsArrayBuffer() in iOS Safari works for the first ~60 seconds, then fails with: nginx Copy code WebKitBlobResource error 1 This prevents continued processing of the file. It works fine in Chrome,...

My app stores Blobs (e.g., images) in IndexedDB. After closing Safari and reopening, retrieving the same entries via objectStore.index('idx').getAll(key) returns objects—but the Blob does not work when passed to URL.createObjectURL(blob), raising:

After editing a JavaScript or CSS file on the server (via SFTP), refreshing the browser sometimes causes that asset to fail with net::ERR_HTTP2_PROTOCOL_ERROR, even though opening the same file directly works.

Sending an AJAX request with a large JSON payload (e.g. >100 items) from the frontend, but the browser reports net::ERR_HTTP2_PROTOCOL_ERROR. Smaller payloads work fine. What gives?

Chrome console shows net::ERR_HTTP2_PROTOCOL_ERROR for JS or CSS files, even though the files exist and return HTTP 200 OK. Why does this happen and how can I fix it?

I'm comparing values in JavaScript and seeing unexpected results—like '0' == 0 returning true, or empty arrays comparing greater than expected. Why does this happen, and which should I use?

I used a loop to register click handlers with a closure variable, but all handlers log the same value instead of each iteration's value. Example: js Copy code for (var i = 0; i < 3; i++) { button.addEventListener('click', function() { con...

When performing operations like 0.1 + 0.2 or multiplying decimals, the results aren’t what I expect. For example: js Copy code console.log(0.1 + 0.2); // 0.30000000000000004 instead of 0.3 Why does this happen, and how should I handle it?

I attached a click handler on a parent container to detect button clicks (event delegation). But sometimes clicking a button triggers multiple handlers unexpectedly—like ancestor handlers or unintended list items. How can I reliably manage this?

I'm running multiple asynchronous calls in an async function. Even though I wrap them in try/catch, some promise rejections still escape and become unhandled.

I have asynchronous code using Promises or async/await, and sometimes errors are not caught—leading to silent failures or warnings such as UnhandledPromiseRejectionWarning. How can I prevent this?

Why am I encountering a 401 Unauthorized error when attempting to load the google/gemma-2b model inside VS Code, but it works without any issues when I run the same command in the terminal? What could be causing this discrepancy, and how can I troubl...