var.js

var sanityHTMLClass = (str) => {
    if (typeof str !== 'string') {
        return '';
    }
    return str
        // replace for v?s?printf 
        .replace(/%[a-fA-F0-9][a-fA-F0-9]/, '')
        // Limit to A-Z,a-z,0-9,_,-
        .replace(/[^A-Za-z0-9_-]/, '');
}