Function getPageTitle

packages/muya/src/utils/paste.ts:8–35

(url: string)

export const isOnline = () => navigator.onLine === true;

export async function getPageTitle(url: string) {
    // No need to request the title when it's not url.
    if (!url.startsWith('http'))
        return '';

    // No need to request the title when off line.
    if (!isOnline())
        return '';

    try {
        const res = await fetch(url, { method: 'GET', mode: 'cors' });
        const contentType = res.headers.get('content-type');

        if (res.status !== 200 || !contentType || !/text\/html/i.test(contentType))
            return '';

        // The response is HTML — read it as text and pluck `<title>`.
        // Pre-fix this called `res.json()`, which always threw and made
        // the helper silently return '' (marktext 141d25d8 / #1344).
        const body = await res.text();
        const match = body.match(/<title>([\s\S]*?)<\/title>/i);

        return match && match[1] ? match[1].trim() : '';
    }
    catch {
        return '';
    }
}

export async function normalizePastedHTML(html: string) {
    // Only extract the `body.innerHTML` when the `html` is a full HTML Document.