https://github.com/92181/calculator
A small and lightweight Javascript calculator. Useful for integration into web applications.
https://github.com/92181/calculator
calculator html javascript math parser
Last synced: about 1 month ago
JSON representation
A small and lightweight Javascript calculator. Useful for integration into web applications.
- Host: GitHub
- URL: https://github.com/92181/calculator
- Owner: 92181
- License: mit
- Created: 2023-12-28T15:50:25.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2025-06-19T22:42:30.000Z (about 1 year ago)
- Last Synced: 2025-06-19T23:27:55.202Z (about 1 year ago)
- Topics: calculator, html, javascript, math, parser
- Language: HTML
- Homepage:
- Size: 103 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Javascript Calculator
A small and lightweight calculator library/template, It gives a good illustration on how a calculator parses a string and resolves the containing calculation.
It has no dependencies and can be used freely in a web application for example.
Various things that it can do are...
* Handle floating point inaccuracies and return a high resolution result.
* Perform complex calculations such as π+5π(2+1.1) and 5!%4^2.
* The unminified version is just 2 KB large making it capable of being used in virtually any package.
It is also contains an RPN (Reverse Polish Notation) mode which allows you to calculate things in a more direct and 'faster' way.
# Basic Usage
You can try it out directly in your browser although locally. The calculator logic is packaged in the same file as the demo. You can extract the logic and build around it if you wish to do so.
The functionality can easily be extended to include more advanced operations such as the usage of cosine and the processing of other vectors.
```javascript
// Parse String And Return Result Of Given Calculation;
let i=res(P.value);if(Number.isInteger(i)){P.value=i}else{P.value=parseFloat(i.toFixed(8))};P.focus();
```
# Preview Image
# License
This project is licensed under the permissive MIT license. Please consider starring the project if you like it.