Category: JavaScript

Capture USB or Bluetooth barcode scans in a web form, submit them with Fetch, and prevent duplicate attendance records on the server.

Use matchAll, named capture groups, and a newline-safe pattern to extract text blocks followed by two-letter language markers.

Use a WebSocket server implementation instead of reading browser traffic as raw TCP bytes, and receive text frames as decoded strings.

Load one compatible Bootstrap bundle, remove duplicate or mismatched scripts, and initialize dropdowns only after the bundle is available.

Use data attributes for short public strings and a WeakMap for private objects, callbacks, and component state without modifying DOM objects.

Keep menu state in a CSS class, update aria-expanded from the resulting state, and avoid one-time inline-style comparisons.

Restore the standard gtag wrapper, verify command order and the measurement ID, then confirm a collection request and DebugView event.

Handle the contextmenu event, position an HTML menu inside the viewport, and provide an equivalent keyboard-accessible control.

Set a real data attribute on the element and match its exact serialized value with a CSS attribute selector.

Poll the Gamepad API once per frame and compare the current button state with the previous snapshot to detect new presses.