There is a moment in every campaign when the world stops being something you observe and starts becoming something you influence. Up to this point, I had been shaping structure and appearance. The terrain existed. The armor was in place. The realm looked complete, but it did not yet respond. It waited. JavaScript is where that waiting ends. When I first stepped into this part of the stack, I realized something subtle but important. The browser is not just rendering a page. It is executing a sequence of instructions. It reads, evaluates, and moves forward through time. That sense of progression, of one thing happening after another, is the foundation…