Skip to main content

Random Captcha Generator

 How to generate random captcha || JAVASCRIPT techinc


Here, you will going to teach how to generate random captcha by javascript


#CODE:

<!DOCTYPE html>

    <html>

        <head>

            <title></title>

        </head>

        <body>

            <canvas width=150 height=70 style="border:1px solid black;"></canvas><br>

            <button style="width:150px;

            height:40px;

            color: red;

            -webkit-tap-highlight-color:rgba(0,0,0,0);" onclick="generateCaptcha()">Generate Captcha</button>

            <style type="text/css">

                body{

                    text-align:center;

                    background-color:#00FA9A;                            

                }

                canvas{

                    background:white;

                }

            </style>

            <script type="text/javascript">

let canvas = document.querySelector("canvas");

let ctxt = canvas.getContext("2d")

function generateCaptcha(){

let captcha = Math.floor(Math.random()*8999+1000);

captcha = captcha.toString();

ctxt.beginPath();

ctxt.clearRect(-150,-70,320,150)

let syms = [];

let hex = "12345";

for(let i=0;i<2100;i++){

        ctxt.fillStyle = "#"+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)];

        ctxt.fillRect(Math.floor(Math.random()*150),Math.floor(Math.random()*70),1,1);

}

ctxt.fillStyle = "black";

for(let i=0;i<4;i++){

    syms.push(document.createElement("canvas"));

    syms[i].width = 130;

    syms[i].height = 130;

    ctx = syms[i].getContext("2d");

    ctx.rotate(Math.floor(Math.random()*35-15) * Math.PI / 180)

    ctx.fillStyle = "#"+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)]+hex[Math.floor(Math.random()*hex.length)];

    let font = Math.floor(Math.random()*35+85);

    ctx.font = font+"px Arial";

    ctx.fillText(captcha[i],40,font-10);

//ctxt.drawImage(syms[i],30,30,15+((i*40)-font)/2+30,Math.floor(Math.random()*25+35));

    ctxt.drawImage(syms[i],20*i+25,15,30+Math.floor(Math.random()*15-5),30+Math.floor(Math.random()*15-5));

}}

generateCaptcha();

            </script>

        </body>

</html>

#OUTPUT:

                                







Labels:

Comments

Post a Comment

The Most Populer

Hide Animation with Hover

How to Hide the Text by HTML with the Hover Effect  So, The Html-Css are the one by using you can bring the change. A lots of Design and Animations you can make through coding.      Here, I done with the Hide Text code, In which The text hide with the mouse pointer and with Animation. It also in the categories of MouseMove Operation. Just do it once and expand your knowledge with codoblog. #CODE                                                     <html>  <head>  <meta name="viewport" content="width=device-width, initial-scale=1" >   <style type="text/css">   body{   margin: 0;   padding: 0;   min-width: 100vh;   width: 100%;   display: flex;   align-items:center;   j...
Post a Comment
Read more

The World Map

The World Map Here is the code of Designing the WORLD MAP by using Html-Css-Js only.Google Map provide you the option that is Map for Developer. So, CodoBlog provide you the code for how to design the map. CODE -     <!DOCTYPE html> <html> <head> <meta charset="UTF-8">     <meta name="viewport" content="width=device-width, initial-scale=1.0">     <link href='https://api.mapbox.com/mapbox-gl-js/v1.8.1/mapbox-gl.css' rel='stylesheet'/>     <link rel="stylesheet" type="text/css" href=""> <title>The World Map</title> <style> *{ margin: 0; padding: 0; } #map{ width: 100vw; height: 100vh; } </style> </head> <body> <div id='map'></div> </body> <script src='https://api.mapbox.com/mapbox-gl-js/v1.8.1/mapbox-gl.js'></script> <script> mapboxgl.accessTok...
Post a Comment
Read more

Digital calender

                     Design A Digital Calender Design a code for accesing and designing calender. #CODE                                                                     <!DOCTYPE html> <html> <head> <meta charset="UTF-8">     <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Calender UI</title> <style type="text/css"> @import url('https://fonts.googleapis.com/css?family=Lobster:wght@200;300;400;500;600;700;800;900&display=swap'); *{ margin: 0; padding: 0; box-sizing: border-box; font-family: 'Lobster', sans-serif; } body{ display: flex; justify-content: center; align-items: center; min-height: 100v...
Post a Comment
Read more