captcha-generator

A highly customizable CAPTCHA generator using canvas in TypeScript.

Installation

npm install @ddededodediamante/captcha-generator

Usage

import Captcha from '@ddededodediamante/captcha-generator';
import fs from 'fs';

const captcha = new Captcha({
  width: 250,
  height: 100,
  backgroundColor: '#f0f0f0',
  textColor: '#333',
  font: 'Arial',
  fontSize: 40
});

const { text, buffer } = captcha.generate("image/png");
console.log('CAPTCHA text:', text);
fs.writeFileSync('captcha.png', buffer);

API

new Captcha(options?)

Creates a CAPTCHA generator with optional settings:

| Option | Type | Default | Description | |------------------|----------|----------------|-------------------------------------| | width | number | 200 | Canvas width in pixels | | height | number | 80 | Canvas height in pixels | | backgroundColor| string | #ffffff | Background color | | textColor | string | #000000 | Color of the CAPTCHA text | | font | string | Sans | Font family | | fontSize | number | 32 | Font size in pixels | | characters | string | ABCDEFGHI... | Characters used in the CAPTCHA text | | charLength | number | 6 | Number of characters in the CAPTCHA | | noiseLines | number | 4 | Number of random noise lines | | noiseDots | number | 100 | Number of random noise dots | | noiseColor | string | #888888 | Color for noise lines and dots |

generate(mime?, quality?)

Generates the CAPTCHA, returns { text: string; buffer: Buffer }.