React implementation of calculator built with Vite and Vitest, based on Andrew Farmer's calculator. It is inspired by shunting-yard algorithm.

Requires Node ≥ 20.19 / ≥ 22.12 (see .nvmrc).

Try it

https://simplicity.albertoarena.it/react-calculator/

Install it

yarn or npm install

Use it

yarn dev or npm run dev

Test it

yarn test (single run) or yarn test:watch

Build it

yarn build or npm run build (outputs to dist/)

Deploy it

yarn deploy publishes dist/ to GitHub Pages.

Options

It has a basic and extended version.

It supports basic operators (+, -, /, *, ^), trigonometric operators and precedence.

Operators

Order of operations follows the standard (see Wikipedia).

High precedence

• ^: exponent (power)
• ^2: square
• √: square root (alias sqrt)
• eˣ: exponential
• !: factorial
• %: percentage
• 1/x: reciprocal
• ±: unary negation

Medium precedence

• ×: multiplication
• /: division
• sin, cos, tan: trigonometric (radians or degrees, toggleable)
• ln: natural logarithm
• log: base-10 logarithm

Low precedence

• +: addition
• -: subtraction

Constants

• π: pi
• e: Euler's number