Triecaptcha

CAPTCHA generator for Node.js with customizable options.

Installation

npm install triecaptcha

Usage

Basic Usage

const CAPTCHAGenerator = require('triecaptcha');
const fs = require('fs');

const captcha = new CAPTCHAGenerator();
const { image, text, hash } = captcha.generate();

// Save image to file
fs.writeFileSync('captcha.png', image);

console.log(`CAPTCHA text: ${text}`);
console.log(`CAPTCHA hash: ${hash}`);

Custom Options

const captcha = new CAPTCHAGenerator({
  width: 400,
  height: 150,
  length: 8,
  characters: 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789', // Avoid ambiguous characters
  textColor: '#FF5733',
  background: '#F0F0F0',
  noise: 500,
  font: 'bold 60px Comic Sans MS'
});

Verification

const isValid = captcha.verify(userInput, storedHash);

Express Example

See examples/express-example.js for a complete Express server implementation.

Options

Option	Type	Default	Description
width	number	300	Image width
height	number	100	Image height
textColor	string	'#FFFFFF'	Text color
length	number	6	CAPTCHA length
characters	string	'0123456789'	Characters to use
background	string	'#000000'	Background color
noise	number	300	Number of noise elements
font	string	'bold 50px Arial'	Font style
hashAlgorithm	string	'sha256'	Hash algorithm for verification

License

MIT