JSFiddle - React, Tailwind, and code Playground

by nnnnnn

HTML

<div data-include="src.html"></div>
<div>Not an include element</div>
<div data-include="other.html"></div>

<p data-include="paragraph.html"></p>

JavaScript

window.onload = function() {

    var elements = document.querySelectorAll("[data-include]");
    for (var i = 0; i < elements.length; i++)
        include(elements[i].getAttribute("data-include"), elements[i]);

};


function include(src, elem){
    elem.innerHTML = src;
}