Utils methods on Javascript

const randomString = () => Math.random().toString(36).slice(2);

const escape = (str) => str.replace(/[&<>"']/g, (m) => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[m]));

const capitalize = (str) => str.toLowerCase().replace(/^(.)|\s+(.)/g, (c) => c.toUpperCase());

const camelCase = (str) => str.trim().replace(/[-_\s]+(.)?/g, (_, c) => (c ? c.toUpperCase() : ''));