Rustdoc htmxify

// ==UserScript==
// @name         rustdoc htmxify
// @version      0.1
// @description  enhance rustdoc with a little bit of htmx
// @author       bits0rcerer
// @match        http://*/*
// @match        https://*/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const boostable = ["constant", "fn", "type"];

    const wrapper = document.querySelector("#rustdoc_body_wrapper") || document.body;
    if (!wrapper.className.includes("rustdoc")) return;

    let doc_type = null;
    for (const t of boostable) {
        if (wrapper.classList.contains(t)) {
            doc_type = t;
            break;
        }
    }

    if (!doc_type) return;

    const sidebar_list = document.querySelector(".sidebar-elems ." + doc_type);
    sidebar_list.setAttribute("hx-boost", "true");
    sidebar_list.setAttribute("hx-select", "main");
    sidebar_list.setAttribute("hx-target", "main");

    fetch("https://unpkg.com/htmx.org").then(r => r.text()).then(code => {
        const htmx = document.createElement("script");
        htmx.innerText = code;
        document.head.appendChild(htmx);
    });
})();