Mat Marquis - Mochiai.blog

A browser open to an empty page, with the console opened. The first line is ‘console.log("Called.")’. The second line reads “Called.” The third line reads “undefined” is present, at a much lower contrast.

An Introduction to JavaScript Expressions | CSS-Tricks

By Mat Marquis
October 22, 2025

Editor’s note: Mat Marquis and Andy Bell have released JavaScript for Everyone, an online course offered exclusively at Piccalilli. This post is an excerpt…