JSFiddle - React, Tailwind, and code Playground

JavaScript

$('.testimonial-content').first().addClass('active');
		$('.testimonial-bio').first().addClass('active');
		$('.testimonial-bio').click(function(event) {
			var id = $(this).data('testimonial-id');
			$('.testimonial-bio').removeClass('active');
			$('#testimonial-bio-' + id).addClass('active');
			$('.testimonial-content').slideUp('fast');
			$('#testimonial-content-' + id).slideToggle();
		});
	});