Compute.js

An expression calculator for JavaScript

Features

• Basic math operators:
  • + - Addition
  • - - Subtraction
  • * - Multltiplication
  • / - Division
  • ^ - Power (right associative)
  • % - Modulo division
• Brackets support
• Operators precedence support
• Custom functions support
• Function recursion support
• Variables support
• Unary operators support

Demo

You can try it on JSFiddle

How it use

Just call a function:

Compute(expression, functions, variables);

Simple usage

let result = Compute('5 * (3 + 4) + 3');
console.log(result); // displays 38

Functions call

let result = Compute('10 + dist(5, dist(3, 4))', {
	dist: function (args) {
  	return (args[0] ** 2) + (args[1] ** 2);
  }
 });
 
console.log(result); // displays 660

Variables support

let result = Compute('myvar ^ 2', {}, {
	myvar: 32
});
 
console.log(result); // displays 1024

License

This project licensed with MIT license

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