Mini Project: Calculator — Free JavaScript Tutorial

Learn Mini Project: Calculator in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

Mini Project: Calculator — Free JavaScript Tutorial

Learn Mini Project: Calculator in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

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TL;DR: Learn Mini Project: Calculator in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

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Mini Project: Calculator in JavaScript

A calculator mini project practices: DOM manipulation, event listeners, string parsing, and UI feedback.

Key concepts: evaluating expressions safely (avoid `eval()`), handling edge cases (divide by zero, multiple operators).

Building UIs with CSS grid for button layout. Using button data attributes to identify clicked values.

Learn Mini Project: Calculator step by step with Syllab's free interactive JavaScript tutorial — runnable code examples, practice exercises and instant AI feedback, all free with no signup. Explore the full JavaScript course →