JSFiddle - React, Tailwind, and code Playground
JavaScript
var form = $('<form method="post">');
form.attr('action','//jsfiddle.net/api/post/library/pure/');
var html = $('<textarea>').attr('name','html').val('<span>test</span>').appendTo(form);
var css = $('<textarea>').attr('name','css').val('span {color:red;}').appendTo(form);
var js = $('<textarea>').attr('name','js').val('var i = 1;').appendTo(form);
form.appendTo(document.body);
form.submit();