JSFiddle - React, Tailwind, and code Playground

HTML

<a href="link" class='dynamicLink'>link</a>

<a href="link" class='dynamicLink'>link</a>

<button onclick="changeLinks()">change</button>

JavaScript

function changeLinks() {
    var href = "http://www.google.com"
    var links = document.getElementsByClassName('dynamicLink');
    for (var i = 0; i < links.length; i++) {

        links[i].href = href;
        links[i].innerHTML = href.replace('http://',"");
    }
}