Kako napraviti Collapse grupnu Formu?

U ovome primjeru kreiraćemo jednostavnu Collapse grupnu Formu.



<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>IT TUTORIJALI | Collapsible Group</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:400,500|Open+Sans">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
<style>
.accordion .card {
    border-radius: 0;
    border: none;
    margin-bottom: 5px;
    padding-bottom: 3px;
}
.accordion .card-header {
    background: #ececec;
    padding: .4rem 1rem;
    border-radius: 0;
    margin-bottom: -2px;
    font-family: "Roboto", sans-serif;
    box-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    margin: 0 3px 3px 0;
    border: none;
}
.accordion .card-header:hover {
    background: #e0e0e0;
}
.accordion .card-header .btn {
    font-size: 1.04rem;
    font-weight: 500;
    width: 100%;
    text-align: left;
    position: relative;
    top: -2px;
}
.accordion .card-header i {
    float: right;
    font-size: 1.3rem;
    font-weight: bold;
    position: relative;
    top: 5px;
}
.accordion .card-header button:hover {
    color: #23384e;
}
.accordion .card-header.highlight {
    color: #fff;
    background: #47b9de;
}
.accordion .card-body {
    text-align: justify;
}
</style>
<script>
$(document).ready(function(){
    // Dodavanje ikone minus za element sažimanja (collapsible) koji je otvoren prema zadanim postavkama
    $(".collapse.show").each(function(){
        $(this).siblings(".card-header").find(".btn i").html("remove");
        $(this).prev(".card-header").addClass("highlight");
    });

    // Prebacivanje ikonu plus/minus na sakrivanju sažetog (collapse) elementa
    $(".collapse").on('show.bs.collapse', function(){
        $(this).parent().find(".card-header .btn i").html("remove");
    }).on('hide.bs.collapse', function(){
        $(this).parent().find(".card-header .btn i").html("add");
    });

    // Označite otvoreni sažeti (collapse) element
    $(".card-header .btn").click(function(){
        $(".card-header").not($(this).parents()).removeClass("highlight");
        $(this).parents(".card-header").toggleClass("highlight");
    });
});
</script>
</head>
<body>
<div class="container-lg">
    <div class="row">
        <div class="col-lg-6 offset-lg-3">
            <div class="accordion mt-5" id="accordionExample">
                <div class="card">
                    <div class="card-header" id="headingOne">
                        <h2 class="clearfix mb-0">
                            <a class="btn btn-link"
                            data-toggle="collapse" data-target="#collapseOne"
                            aria-expanded="true" aria-controls="collapseOne"> Collapsible
                            Group Element #1 <i class="material-icons">add</i></a>
                        </h2>
                    </div>
                    <div id="collapseOne" class="collapse show"
                        aria-labelledby="headingOne" data-parent="#accordionExample">
                        <div class="card-body">Lorem ipsum
                        dolor sit amet, consectetur adipiscing elit. Nam eu sem tempor,
                        varius quam at, luctus dui. Mauris magna metus, dapibus nec turpis
                        vel, semper malesuada ante. Vestibulum id metus ac nisl bibendum
                        scelerisque non non purus. Suspendisse varius nibh non aliquet
                        sagittis. In tincidunt orci sit amet elementum vestibulum.</div>
                    </div>
                </div>
                <div class="card">
                    <div class="card-header" id="headingTwo">
                        <h2 class="mb-0">
                            <a class="btn btn-link collapsed"
                            data-toggle="collapse" data-target="#collapseTwo"
                            aria-expanded="false" aria-controls="collapseTwo"> Collapsible
                            Group Element #2 <i class="material-icons">add</i></a>
                        </h2>
                    </div>
                    <div id="collapseTwo" class="collapse"
                        aria-labelledby="headingTwo" data-parent="#accordionExample">
                        <div class="card-body">Anim pariatur
                        cliche reprehenderit, enim eiusmod high life accusamus terry
                        richardson ad squid. 3 wolf moon officia aute, non cupidatat
                        skateboard dolor brunch. Food truck quinoa nesciunt laborum
                        eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it
                        squid single-origin coffee nulla assumenda shoreditch et.</div>
                    </div>
                </div>
                <div class="card">
                    <div class="card-header" id="headingThree">
                        <h2 class="mb-0">
                            <a class="btn btn-link collapsed"
                            data-toggle="collapse" data-target="#collapseThree"
                            aria-expanded="false" aria-controls="collapseThree"> Collapsible
                            Group Element #3 <i class="material-icons">add</i></a>
                        </h2>
                    </div>
                    <div id="collapseThree" class="collapse"
                        aria-labelledby="headingThree" data-parent="#accordionExample">
                        <div class="card-body">Lorem ipsum
                        dolor sit amet, consectetur adipiscing elit. Nam eu sem tempor,
                        varius quam at, luctus dui. Mauris magna metus, dapibus nec turpis
                        vel, semper malesuada ante. Vestibulum id metus ac nisl
                        bibendum scelerisque non non purus. Suspendisse varius nibh non
                        aliquet sagittis. In tincidunt orci sit amet elementum vestibulum.</div>
                    </div>
                </div>
                <div class="card">
                    <div class="card-header" id="headingFour">
                        <h2 class="mb-0">
                            <a class="btn btn-link collapsed"
                            data-toggle="collapse" data-target="#collapseFour"
                            aria-expanded="false" aria-controls="collapseFour"> Collapsible
                            Group Element #4 <i class="material-icons">add</i></a>
                        </h2>
                    </div>
                    <div id="collapseFour" class="collapse"
                        aria-labelledby="headingFour" data-parent="#accordionExample">
                        <div class="card-body">Anim pariatur
                        cliche reprehenderit, enim eiusmod high life accusamus terry
                        richardson ad squid. 3 wolf moon officia aute, non cupidatat
                        skateboard dolor brunch. Food truck quinoa nesciunt laborum
                        eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it
                        squid single-origin coffee nulla assumenda shoreditch et.</div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
</body>
</html>