JSFiddle - React, Tailwind, and code Playground

HTML

<p>Completely synergize resource sucking relationships via premier niche markets. Professionally cultivate one-to-one customer service with robust ideas. Dynamically innovate resource-leveling customer service for state of the art customer<a href="#" class="btn-context"> solutions.</a>
</p>

<p class="inside-context">Completely synergize resource sucking relationships via premier niche markets. Professionally cultivate one-to-one customer service with robust ideas. Dynamically innovate resource-leveling customer service for state of the art customer service.</p>

<p>Completely synergize resource sucking relationships via premier niche markets. Professionally cultivate one-to-one customer service with robust ideas. Dynamically innovate resource-leveling customer service for state of the art customer<a href="#" class="btn-context"> solutions.</a>
</p>

<p class="inside-context">Completely synergize resource sucking relationships via premier niche markets. Professionally cultivate one-to-one customer service with robust ideas. Dynamically innovate resource-leveling customer service for state of the art customer service.</p>

CSS

.inside-context {
    opacity: 0;
    display: none;
}
.inside-context.open {
    opacity: 1;
    display: block;
}

JavaScript

$(document).ready(function () {
    $(".btn-context").on('click', function (event) {

        if ($('.inside-context').hasClass('open')) {
            $('.inside-context').removeClass('open');
        } else {
            $('.inside-context').addClass('open');
        }

        event.preventDefault();

    });
});