How pinterest type url's work <p>When we click on pinterest pin the url changes to pinterest.com/pin/[pinid] But how come it happens without full loading of the page and only the url is changed. <img src="https://i.stack.imgur.com/JVmnI.jpg" alt="enter image description here"> <img src="https://i.stack.imgur.com/LfYJk.jpg" alt="enter image description here"></p>