Google Analytics is NOT the right place to keep track of your JS errors. Read here how to use Sentry instead. (more…)

There is no faster (pun intended) way to slow down a site than to use a bunch of JavaScript. (more…)

The WeakMap object is a collection of key/value pairs in which the keys are weakly referenced. The keys must be objects and the values can… (more…)

Spoiler alert: tooltips, modals, tabs, carousels, and dropdown menus are some of the user interface components that require more than CSS. To ensure accessibility of your interface, JavaScript is a necessary addition to accomplish focus management, respon... (more…)

For the last year, we've been gradually migrating our backend Telemetry systems from AWS to GCP. I've been helping out here and there with this effort, most recently porting a job we used to detect slow tab spinners in Firefox nightly, which produced a sm... (more…)