JSFiddle - React, Tailwind, and code Playground

by Sergey Denisov

HTML

<button type="button" class="js-button">+</button>
<div class="content js-content">This is content</div>

CSS

.content {
    display: none;
}

    .content_visible {
        display: block;
    }

JavaScript

var $content = $('.js-content');

if (localStorage.getItem('isVisible') === 'true') {
    $content.addClass('content_visible');
}

$('.js-button').on('click', function() {
    $content.toggleClass('content_visible');
    localStorage.setItem('isVisible', $content.hasClass('content_visible'));
});