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catchup-captcha
Advanced tools
Readme
Catchup is a simple node package made with pure JavaScript
Catchup produces a random 6 digit and alphabetical character (by default) as a string to be read by human beings. Users must enter the exact match of the characters generated to become validated as a non-robotic user.
$ npm install catchup-captcha
import catchup from "catchup-captcha";
const captcha = new catchup({
stringLength: 6,
lineNoise: 25,
dotNoise: 150,
})
let captchaData = captcha.draw();
The draw() method returns an object contains "code" and "imageData" as the example below:
{code: 'OTJ8U1', imageData: 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwA…LmbVC6xICfjElY2KTsV/8P0j3QF9cHWJSAAAAAElFTkSuQmCC'}
Then you can use 'imageData' property to use as source of image tag like this:
document.getElementById("captchaImage").src = captchaData.imageData;
<img src="" id="captchaImage" />
It is obvious that to prevent from attacks, you better store the generated captcha with the user who is requesting for it, so the attacker can't send you the similar riddle and his solution. This package is not doing it as it maybe differences in different project flows.
Of course that this package is not perfect and can be extended in many ways. Please FEEL FREE TO CONTRIBUTE, DEVELOP AND FIX BUGS by a pull request. I'd be glad to hear your suggestions or anything else from you through alireza_mortezaei@hotmail.com
FAQs
A simple captcha for using in front-end
The npm package catchup-captcha receives a total of 120 weekly downloads. As such, catchup-captcha popularity was classified as not popular.
We found that catchup-captcha demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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Product
Streamline your login process and enhance security by enabling Single Sign-On (SSO) on the Socket platform, now available for all customers on the Enterprise plan, supporting 20+ identity providers.
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