Build a Tip Calculator in Vanilla JavaScript: a beginner DOM project

This article guides developers through building a tip calculator in Vanilla JavaScript, covering user input, real-time calculation, and clean output. The calculator handles bill splitting and requires no API calls or data storage. To build it, developers should first get the arithmetic right and then wire the formula to input fields. The calculator should recalculate on every input event, rather than requiring the user to press a button.