JSFiddle - React, Tailwind, and code Playground

by James Goodwin

HTML

<div class="passengers-list dropdown-box active">
	<div class="lists-content">
		<div class="list-item">
			<span class="list-name" data-description="Старше 12 лет">Взрослые</span>
			<div class="numeric-selector">
				<a class="minus"><i class="material-icons">remove</i></a>
				<input id="adult-counter" type="text" class="numeric-input" min="1" max="9" readonly value="1">
				<a class="plus"><i class="material-icons">add</i></a>
			</div>
		</div>
		<div class="list-item">
			<span class="list-name" data-description="От 2 до 12 лет">Подростки</span>
			<div class="numeric-selector">
				<a class="minus"><i class="material-icons">remove</i></a>
				<input id="teen-counter" type="text" class="numeric-input" min="0" max="8" readonly value="0">
				<a class="plus"><i class="material-icons">add</i></a>
			</div>
		</div>
		<div class="list-item">
			<span class="list-name" data-description="До 2 лет">Младенцы</span>
			<div class="numeric-selector">
				<a class="minus"><i class="material-icons">remove</i></a>
				<input id="kid-counter" type="text" class="numeric-input" min="0" max="9" readonly value="0">
				<a class="plus"><i class="material-icons">add</i></a>
			</div>
		</div>
	</div>
</div>

CSS

@import url('https://fonts.googleapis.com/icon?family=Material+Icons');
@import url('https://fonts.googleapis.com/css?family=Open+Sans');
.passengers-list {
    font-family: 'Open Sans', sans-serif;
    z-index: -1;
    visibility: hidden;
    opacity: 0;
    position: absolute;
    top: 20px;
    left: 20px;
    width: 50%;
    margin: 0 auto;
    box-shadow: 0 6px 10px 0 rgba(0, 0, 0, 0.04);
    border-radius: 0 0 4px 4px;
    transition: opacity .25s, visibility .25s, transform .25s;
    transform: translateY(-20px);
}
.passengers-list.active {
    z-index: 10;
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
}
.passengers-list .lists-content {
    position: relative;
    overflow: hidden;
    z-index: 12;
    background: #fff;
    padding: 18px;
    border-radius: 0 0 4px 4px;
}
.passengers-list .lists-content > .list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin: 0 0 12px;
}
.passengers-list .lists-content > .list-item > .list-name {
    position: relative;
    font-size: 0.825rem;
    text-align: left;
}
.passengers-list .lists-content > .list-item > .list-name:after {
    position: relative;
    content: attr(data-description);
    font-size: 0.6rem;
    display: block;
    color: #9e9e9e;
}
.passengers-list .lists-content > .list-item > .numeric-selector {
    position: relative;
    font-size: 0;
    padding: 2px 0;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
}
.passengers-list .lists-content > .list-item > .numeric-selector a {
    position: relative;
    display: inline-block;
    cursor: pointer;
    width: 24px;
    height: 26px;
    -webkit-transition: all .25s;
    transition: all .25s;
}
.passengers-list .lists-content > .list-item > .numeric-selector a.minus {
    border-radius: 2px 0 0 2px;
    border: 1px solid rgba(224, 224, 224, 0.5);
    color: #ef9a9a;
}
.passengers-list .lists-content > .list-item >...

JavaScript

$(() => {
    let input = $('.numeric-input'),
        minus = input.prev('a.minus'),
        plus = input.next('a.plus');
    
    minus.html(function(){
        if($(this).next(input).val() == $(this).next(input).attr('min'))
            $(this).addClass('disabled');
    });

    plus.on('click', function(){
        let max = $(this).prev(input).attr('max')
        if($(this).prev(input).val() === max)
            $(this).addClass('disabled');
    });

    minus.on('click', function(){
        let min = $(this).next(input).attr('min');
        if($(this).next(input).val() !== min){
            let i = parseInt($(this).next(input).val(), 10);
            $(this).next(input).val(--i).change();
            $(this).parent().find('a.plus').removeClass('disabled');
        }
        if($(this).next(input).val() == min)
            $(this).addClass('disabled');
    });

    plus.on('click', function(){
        let max = $(this).prev(input).attr('max');
        if($(this).prev(input).val() !== max){
            let i = parseInt($(this).prev(input).val(), 10);
            $(this).prev(input).val(++i).change();
            $(this).parent().find('a.minus').removeClass('disabled')
        }
        if($(this).prev(input).val() == max)
            $(this).addClass('disabled');
    });
});