Escape all quotes (single or double), text may include such characters. Good for dynamic text for HTML attributes.

escape-all-quotes.js

 // We have 2 capture groups of each quote type, and than replace each on with 

"h\"ell'o there".replace(/(")|(')/g, '\\$1$2');

const escapeHtml = (unsafeText) => {
        return unsafeText
            .replaceAll('&', '&')
            .replaceAll('<', '&lt;')
            .replaceAll('>', '&gt;')
            .replaceAll('"', '&quot;')
            .replaceAll("'", '&#039;');
    };