A userscript that adds preview links to HTML files
// ==UserScript==
// @name GitHub HTML Preview
// @version 0.1.1
// @description A userscript that adds preview links to HTML files
// @license MIT
// @author Rob Garrison
// @namespace https://github.com/Mottie
// @include https://github.com/*
// @run-at document-idle
// @grant none
// @require https://greasyfork.org/scripts/28721-mutations/code/mutations.js?version=666427
// @icon https://github.githubassets.com/pinned-octocat.svg
// ==/UserScript==
(() => {
"use strict";
// Example page: https://github.com/codrops/DecorativeLetterAnimations
// Source: https://github.com/htmlpreview/htmlpreview.github.com
const prefix = "http://htmlpreview.github.io/?";
// html & htm extensions
const regex = /\.html?$/;
const link = document.createElement("a");
link.className = "ghhp-btn btn btn-sm py-0 px-1 tooltipped tooltipped-n";
link.setAttribute("aria-label", "Open in new tab");
link.target = "_blank";
link.innerHTML = `
<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="currentColor">
<path d="M19 19H5V5h7V3H5a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7h-2v7zM14 3v2h3.59l-9.83 9.83 1.41 1.41L19 6.41V10h2V3h-7z"/>
</svg>`;
function addLink(el) {
const cell = el.closest("td.content");
if (!$(".ghhp-btn", cell)) {
const preview = link.cloneNode(true);
preview.href = prefix + el.href;
cell.appendChild(preview);
}
}
function init() {
if ($("table.files")) {
const files = $(".file-wrap");
$$("td.content .js-navigation-open", files).forEach(el => {
if (regex.test(el.title)) {
addLink(el);
}
});
}
}
function $(str, el) {
return (el || document).querySelector(str);
}
function $$(str, el) {
return [...(el || document).querySelectorAll(str)];
}
document.addEventListener("ghmo:container", () => {
// init after a short delay to allow rendering of file list
setTimeout(() => {
init();
}, 200);
});
init();
})();