Htmx swapping metadata

htmx-metadata.js

htmx.on('htmx:beforeSwap', (htmxEvent) => {
    let incomingDOM = new DOMParser().parseFromString(htmxEvent.detail.xhr.response, "text/html");
    // Transpose <meta> data, page-specific <link> tags and JSON-LD structured data
    // Note that hx-boost automatically swaps the <title> tag
    let selector = "head > meta:not([data-revision]), head *[rel=\"canonical\"], head *[rel=\"alternate\"], body script[type=\"application/ld+json\"]";
    document.querySelectorAll(selector).forEach((e) => {
        e.parentNode.removeChild(e);
    });
    incomingDOM.querySelectorAll(selector).forEach((e) => {
        if (e.tagName === 'SCRIPT') {
            document.body.appendChild(e);
        } else {
            document.head.appendChild(e);
        }
    })
});