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Javascript Random Number Generator using jQuery

#jquery #javascript #tutorial

Originally posted @ https://codeanddeploy.com visit and download the sample code: https://codeanddeploy.com/blog/jquery/javascript-random-number-generator-using-jquery

In this post, I will share a javascript random number generator using jQuery with Bootstrap 4. That will generate random lottery numbers with awesome design.

javascript-random-number

Step 1. HTML Structure for Random Number Generator

Build the HTML for the random number generator. See below HTML code:

<form id="startNumbersGeneratorForm">
    <div class="row">
        <div class="col-md-6">
            <div class="form-group">
                <label for="from_balls">From Balls</label>
                <input type="number" name="from_balls" class="form-control" value="5" aria-describedby="fromBallsHelp" min="0">
                <small id="fromBallsHelp" class="form-text text-muted">Enter the maximum number for balls. Ex: 6.</small>
            </div>
        </div>
        <div class="col-md-6">
            <div class="form-group">
                <label for="range_numbers">From Interval Numbers</label>
                <input type="number" name="range_numbers" class="form-control" value="45" aria-describedby="rangeNumbersHelp" min="0">
                <small id="rangeNumbersHelp" class="form-text text-muted">Enter the maximum value for interval of numbers. Ex: 49.</small>
            </div>
        </div>
    </div>
    <div class="row">   
        <div class="col-md-6">
            <div class="form-group">
                <label for="extra_balls">Extra Balls</label>
                <input type="number" name="extra_balls" class="form-control" value="1" aria-describedby="extraBallsHelp" min="0">
                <small id="extraBallsHelp" class="form-text text-muted">Enter the maximum number for extra balls. Ex: 2.</small>
            </div>
        </div>
        <div class="col-md-6">
            <div class="form-group">
                <label for="range_extra_numbers">Extra Interval Numbers</label>
                <input type="number" name="range_extra_numbers" class="form-control" value="20" aria-describedby="rangeExtraNumbersHelp" min="0">
                <small id="rangeExtraNumbersHelp" class="form-text text-muted">Enter the maximum value for interval of extra numbers. Ex: 20.</small>
            </div>
        </div>
    </div>
    <div class="form-group">
        <input type="submit" value="Generate Numbers" name="generate_numbers" class="btn btn-block">
    </div>
</form>
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Step 2: DIV container results 

<div class="form-group">
    <input type="submit" value="Generate Numbers" name="generate_numbers" class="btn btn-block">
</div>
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Step 3: Add CSS

Add CSS files inside a header tag.

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<link rel="stylesheet" href="main.min.css">
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Step 4: Add Javascript

Add Javascript files before </body> clossing.

<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/numbers_generator.min.js"></script>
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Step 5: Complete HMLT Structure

Here is the complete HTML structure of our javascript random number generator using jquery.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Random Numbers Generator</title>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
    <link rel="stylesheet" href="main.min.css">
</head>
<body>
    <div class="container-fluid py-5">
        <div class="row">
            <div class="col-md-8 offset-md-2">
                <h2 class="title text-center">Random Numbers Generator</h2>
            </div>
        </div>
        <div class="row">
            <div class="col-md-8 offset-md-2">
                <form id="startNumbersGeneratorForm">
                    <div class="row">
                        <div class="col-md-6">
                            <div class="form-group">
                                <label for="from_balls">From Balls</label>
                                <input type="number" name="from_balls" class="form-control" value="5" aria-describedby="fromBallsHelp" min="0">
                                <small id="fromBallsHelp" class="form-text text-muted">Enter the maximum number for balls. Ex: 6.</small>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="form-group">
                                <label for="range_numbers">From Interval Numbers</label>
                                <input type="number" name="range_numbers" class="form-control" value="45" aria-describedby="rangeNumbersHelp" min="0">
                                <small id="rangeNumbersHelp" class="form-text text-muted">Enter the maximum value for interval of numbers. Ex: 49.</small>
                            </div>
                        </div>
                    </div>
                    <div class="row">   
                        <div class="col-md-6">
                            <div class="form-group">
                                <label for="extra_balls">Extra Balls</label>
                                <input type="number" name="extra_balls" class="form-control" value="1" aria-describedby="extraBallsHelp" min="0">
                                <small id="extraBallsHelp" class="form-text text-muted">Enter the maximum number for extra balls. Ex: 2.</small>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="form-group">
                                <label for="range_extra_numbers">Extra Interval Numbers</label>
                                <input type="number" name="range_extra_numbers" class="form-control" value="20" aria-describedby="rangeExtraNumbersHelp" min="0">
                                <small id="rangeExtraNumbersHelp" class="form-text text-muted">Enter the maximum value for interval of extra numbers. Ex: 20.</small>
                            </div>
                        </div>
                    </div>
                    <div class="form-group">
                        <input type="submit" value="Generate Numbers" name="generate_numbers" class="btn btn-block">
                    </div>
                </form>
            </div>
        </div>
    </div>
    <div class="row">
        <div class="generic-box generator numbers-generator">
            <div id="generatorResults" class="col-md-8 offset-md-2"></div>
        </div>
    </div>
    <script type="text/javascript" src="js/jquery.js"></script>
    <script type="text/javascript" src="js/numbers_generator.min.js"></script>
</body>
</html>
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Here is the complete CSS code of our main.css.

@charset "UTF-8";

/* GLOBALS AND RESETS */
html, body, div, span, h1, h2, h3, h4, h5, h6, p, a, img, strong, ul, li, form, br {
    margin:0;
    padding:0;
    border:0;
    font-size:100%;
    vertical-align:top;
}

*, *:before, *:after {
    -webkit-box-sizing:border-box;
    -moz-box-sizing:border-box;
    box-sizing:border-box;
}

html {
    background:#d9dde2;
}

body {
    position:relative;
    font-size:1em;
    font-family:"Open Sans", sans-serif;
    -webkit-text-size-adjust:none;
    color:#293444;
    background:#eef2f8;
    font-weight:400;
    min-width:1200px;
}

sup {
    padding:0;
    margin:0;
    font-size:90%;
    line-height:normal;
}

a {
    text-decoration:none;
    color:#cd6a01;
    -webkit-transition:all 0.2s ease-in-out;
    -moz-transition:all 0.2s ease-in-out;
    -ms-transition:all 0.2s ease-in-out;
    -o-transition:all 0.2s ease-in-out;
    transition:all 0.2s ease-in-out;
}

a:hover {
    -webkit-transition:all 0.2s ease-in-out;
    -moz-transition:all 0.2s ease-in-out;
    -ms-transition:all 0.2s ease-in-out;
    -o-transition:all 0.2s ease-in-out;
    transition:all 0.2s ease-in-out;
    color: #FA0;
}

canvas {
    position:absolute;
    top:0;
    z-index:0;
}

a img {
    border:none;
}

li {
    list-style:none;
}

.img-left {
    float:left;
    margin:0 10px 10px 0 !important;
}

.img-right {
    float:right;
    margin:0 0 10px 10px !important;
}

.inline {
    display:inline-block;
}

.transition {
    -webkit-transition:all .2s ease-in-out;
    transition:all .2s ease-in-out;
}

.white {
    color:#FFF;
}

.red {
    color:#cc0000;
}

.btn {
    background:#ffea00;
    background:-moz-linear-gradient(top, #ffea00 0%, #ffbf00 100%);
    background:-webkit-linear-gradient(top, #ffea00 0%, #ffbf00 100%);
    background:linear-gradient(to bottom, #ffea00 0%, #ffbf00 100%);
}


ul {
    position:relative;
    list-style-type:none;
}

ul li {
    padding:6px 0 6px 35px;
    line-height:22px;
    margin-bottom:10px;
    position:relative;
}

ul li:before {
    content:"";
    width:26px;
    height:26px;
    background: url(/loto/img/icon-sprite.png) no-repeat 10.493% 9.346%;
    background-size:500px 1500px;
    position:absolute;
    top:5px;
    left:0px;
}

ul li a {
    color: #000;
}

/* TYPOGRAPHY */
h1,h2,h3,h4, .title {
    font:2.250em/48px Oswald, sans-serif;
    color:#ff5301;
    text-transform:uppercase;
    letter-spacing:1px;
}

h1 {
    margin-bottom:20px;
    font-weight:700;
}

h2 {
    font-size:1.750em;
    line-height:34px;
    margin-bottom:15px;
    padding-top:20px;
    font-weight:700;
}

h3, .title {
    font-size:1.5em;
    line-height:26px;
    margin-bottom:15px;
    padding-top:20px;
}

h4, .title {
    font-size:1.313em;
    line-height:24px;
    margin-bottom:15px;
    padding-top:20px;
}

p.white {
    color:#FFF;
}

.generic-box .large {
    font-size:1.65em;
}

p span {
    font-family:"open_bold", sans-serif;
}

.small {
    font-size:0.875em;
}

/* GENERAL CONTENT */
p {
    line-height:30px;
    margin-bottom:25px;
    letter-spacing:-0.5px;
}

/* BUTTONS & LINKS */
.btn {
    position:relative;
    font:1.3em/24px Oswald, sans-serif;
    text-transform:uppercase;
    text-align:center;
    text-decoration:none;
    padding:10px 15px;
    display:inline-block;
    z-index:0;
    border:none;
    cursor:pointer;
    border:1px solid #ffea00;
    -webkit-box-shadow:0 2px 3px 0 rgba(0, 0, 0, 0.5);
    box-shadow:0 2px 3px 0 rgba(0, 0, 0, 0.5);
    border-radius:4px;
    letter-spacing:1px;
    color:#000;
    font-weight:700;
}

.btn:hover, a:hover {
    background:#ffe651;
    background:-webkit-linear-gradient(#ffe651 0%, #ffa023 100%);
    background:-o-linear-gradient(#ffe651 0%, #ffa023 100%);
    background:linear-gradient(#ffe651 0%, #ffa023 100%); 
    color: #000;
}

.btn.green {
    background:#7ad85d;
    background:-moz-linear-gradient(top, #7ad85d 0%, #66b34e 100%);
    background:-webkit-linear-gradient(top, #7ad85d 0%, #66b34e 100%);
    background:linear-gradient(to bottom, #7ad85d 0%, #66b34e 100%);
    border-color:#82e463;
    color:#fff;
}

.btn.green:hover {
    background:#88ec69;
    background:-moz-linear-gradient(top, #88ec69 0%, #75cb5a 100%);
    background:-webkit-linear-gradient(top, #88ec69 0%, #75cb5a 100%);
    background:linear-gradient(to bottom, #88ec69 0%, #75cb5a 100%); 
    color: #FFF;
}

.btn-alt {
    background:#66b34e;
    padding:10px 15px;
    border-radius:4px;
    color:#fff;
    font:1.125em/18px Oswald, sans-serif;
    text-transform:uppercase;
    font-weight:700;
    letter-spacing:1px;
}

.btn-alt:hover {
    background:#76cd5b;
    color: #FFF;
}

.button-box {
    display:inline-block;
    padding:30px 0;
    width:100%;
}

.btn.btn-left {
    float:left;
    position:relative;
}

.btn.btn-right {
    float:right;
    position:relative;
}

.btn.disabled {
    background:#DDD;
    color:#AAA;
    border:1px solid #CCC;
    cursor:default !important;
}

.generic-box {
    display:inline-block;
    width:100%;
    margin-bottom:30px;
    padding:30px;
    position:relative;
    background:#f9f9f9;
    border:1px solid #e3e7ee;
    border-radius:4px;
}

.generic-box .box:last-child {
    border-right:none!important;
}

.generic-box h2 {
    padding-top:0;
}

/* BALL STYLES */
.balls {
    margin-bottom:40px;
}

.balls .ball,.balls .bonus, .ball:last-child {
    border-radius:65px;
    box-shadow:0 -5px 10px 0 rgba(0,0,0,0.5) inset;
    -webkikt-box-shadow:0 -10px 25px 0 rgba(0,0,0,0.5) inset;
    display:inline-block;
    font:1.125em/40px Oswald,sans-serif;
    height:40px;
    letter-spacing:-1px;
    position:relative;
    text-align:center;
    top:0;
    width:40px;
    background:url(/loto/img/icon-sprite.png) no-repeat 54.466% 0;
    background-size:500px 1500px;
    padding:0;
    margin-bottom:0;
    color:#fff;
}

.balls li:before, .ball:last-child:before {
    background:none;
}

.balls .ball:after, .balls .bonus:after {
    content:"";
    display:block;
    height:11px;
    position:absolute;
    bottom:-4px;
    width:40px;
    background:url(/loto/img/icon-sprite.png) no-repeat 54.526% 6.68%;
    background-size:500px 1500px;
}

.balls .bonus.extra {
    background-position:54.466% 3.425%;
    color:#293444;
}

.balls .bonus:before, .ball:last-child:before {
    width:40px;
    height:20px;
    font:11px/18px Oswald;
    color:#293444;
    letter-spacing:0;
    text-shadow:none;
    top:42px;
    line-height:12px;
}

.balls.big .bonus:before {
    top:56px;
    width:50px;
}

.balls.big .ball,.balls.big .bonus {
    background-size:650px 1950px;
    height:52px;
    width:52px;
    font-size:1.500em;
    line-height:54px;
    box-shadow:0 -5px 10px 0 rgba(0,0,0,0.3) inset;
    -webkikt-box-shadow:0 -10px 25px 0 rgba(0,0,0,0.3) inset;
}

.balls.big .ball:after, .balls.big .bonus:after {
    background-size:650px 1950px;
    height:17px;
    bottom:-8px;
    left:0px;
    width:50px;
}

/* NUMBERS GENERATOR */
.numbers-generator .balls .ball {
    background-color:#0b4cd7;
}

.numbers-generator .balls .bonus.extra {
    background-color:#ffdc00;
    color: #293444;
}

.numbers-generator .balls .bonus.extra:before {
    content:"Extra";
}

/* GENERATOR */
.generic-box.generator {
    padding:30px 0 0;
}

.generator .title {
    font-size:1.125em;
    color:inherit;
    margin-left:30px;
}

.generator .balls { 
    margin-left:15px;
}

.generic-box { 
    padding-bottom:15px;
}

/* ANIMATION */
.animated { 
    visibility:hidden;
}

/* GENERATOR */
.balls .innerA { 
    position:absolute;
    width:52px;
    height:52px;
    line-height:52px;
    padding:0;
    margin:0;
    left:0;
    top:0;
    display:block;
    overflow:hidden;
}

.balls .innerB, .balls .number { 
    position:relative;
    width:100%;
    height:100%;
}

.balls .innerB { 
    display:block;
}
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And our number_generator.js code:

$('#startNumbersGeneratorForm').on('submit', function(event){
    event.preventDefault();
    var resultsDiv = $('#generatorResults');
    $(resultsDiv).empty();
    var balls = parseInt($(this).find('input[name="from_balls"]').val());
    var from = parseInt($(this).find('input[name="range_numbers"]').val());
    var balls2 = parseInt($(this).find('input[name="extra_balls"]').val());
    var from_extra = parseInt($(this).find('input[name="range_extra_numbers"]').val());
    var numbers = new Array;

    for(let i = 1; i <= from; i++) numbers.push(i);
    if(from_extra > 0) {
        var extra_numbers = new Array;
        for(let i = 1; i <= from_extra; i++) extra_numbers.push(i); 
    }

    var resultsUl = document.createElement('ul');
    resultsUl.setAttribute('class', 'balls big');
    $(resultsDiv).append(resultsUl);

    if(balls2 > 0) {
        for(let i = 1; i <= balls; i++) {
            var ball = document.createElement('li');
            ball.setAttribute('class', 'ball');
            ball.setAttribute('id', 'B'+i);
            var innerA = document.createElement('span');
            innerA.setAttribute('class', 'innerA');
            var innerB = document.createElement('span');
            innerB.setAttribute('class', 'innerB');
            $(innerA).append(innerB);
            $(ball).append(innerA);
            $(resultsUl).append(ball);
        }
        for(let i = balls + 1; i <= balls + balls2; i++) {
            var extra = document.createElement('li');
            extra.setAttribute('class', 'bonus extra');
            extra.setAttribute('id', 'B'+i);
            var innerA = document.createElement('span');
            innerA.setAttribute('class', 'innerA');
            var innerB = document.createElement('span');
            innerB.setAttribute('class', 'innerB');
            $(innerA).append(innerB);
            $(extra).append(innerA);
            $(resultsUl).append(extra);
        }
        generate(balls, numbers, balls2, extra_numbers);
    } else {
        for(let i = 1; i <= balls; i++) {
            var ball = document.createElement('li');
            ball.setAttribute('class', 'ball');
            ball.setAttribute('id', 'B'+i);
            var innerA = document.createElement('span');
            innerA.setAttribute('class', 'innerA');
            var innerB = document.createElement('span');
            innerB.setAttribute('class', 'innerB');
            $(innerA).append(innerB);
            $(ball).append(innerA);
            $(resultsUl).append(ball);
        }
            generate(balls, numbers);
    }
});

function generate(balls, numbers, balls2=0, extra_numbers=0) { 
    $(".innerB").html("?"); 
    for (var i = 1; i < balls + balls2 + 1; i++){ 
        createNums($("#B" + i + " .innerB"), i, balls, numbers, balls2, extra_numbers); 
    } 
    for (var i = 1; i < balls + balls2 + 1; i++){ 
        moveNums($("#B" + i + " .innerB"), i, balls, numbers, balls2, extra_numbers); 
    }
}; 

function createNums(obj, idNum, balls, numbers, balls2, extra_numbers) {
    if (idNum <= balls) { 
        for (var i = 0; i < numbers.length * 2; i++){ 
            var chosen = Math.floor(Math.random() * numbers.length); 
            obj.append('<div class="number" id="ID_' + idNum + '-' + i + '">' + numbers[chosen] + '</div>'); 
        } 
    } else {
        if(extra_numbers.length > 0) {
            for (var j = 0; j < extra_numbers.length * 2; j++){ 
                var chosen = Math.floor(Math.random() * extra_numbers.length); 
                obj.append('<div class="number" id="ID_' + idNum + '-' + j + '">' + extra_numbers[chosen] + '</div>');
            } 
        }
    } 
}; 

function moveNums(obj, idNum, balls, numbers, balls2, extra_numbers) { 
    var time = 500;
    time += Math.round(Math.random() * 1000); 
    obj.stop(true, true); 
    obj.css('margin-top', '-2080px'); 
    var Duplicates = checkDuplicates(idNum, balls, numbers, balls2, extra_numbers); 
    while (Duplicates) {
        Duplicates = checkDuplicates(idNum, balls, numbers, balls2, extra_numbers)
    } 
    obj.animate( {"margin-top":"-1040px"}, {'duration': time, 'easing': 'swing'} ); 
}; 

function checkDuplicates(idNum, balls, numbers, balls2, extra_numbers) { 
    for (var i = 1; i < balls + 1; i++) { 
        if ( i != idNum && $('#ID_' + i + "-19").html() == $('#ID_' + idNum + "-19").html() ) { 
            $("#B" + idNum + " .innerB").html("?"); 
            createNums($("#B" + idNum + " .innerB"), idNum, balls, numbers, balls2, extra_numbers);
            return true; 
        } 
    } 
    if (balls2 > 1 && idNum > balls) { 
        for (var i = balls + 1; i < balls + balls2 + 1; i++) { 
            if ( i != idNum && $('#ID_' + i + "-19").html() == $('#ID_' + idNum + "-19").html() ) { 
                $("#B" + idNum + " .innerB").html("?");
                createNums($("#B" + idNum + " .innerB"), idNum, balls, numbers, balls2, extra_numbers); 
                return true; 

            } 
        } 
    }
    return false; 
};
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Developed by: MariusDiaconu

I hope this tutorial can help you. Kindly visit here https://codeanddeploy.com/blog/jquery/javascript-random-number-generator-using-jquery if you want to download this code.

Happy coding :)

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