githaven-fork/web_src/js/utils.js

// transform /path/to/file.ext to file.ext
export function basename(path = '') {
  return path ? path.replace(/^.*\//, '') : '';
}

// transform /path/to/file.ext to .ext
export function extname(path = '') {
  const [_, ext] = /.+(\.[^.]+)$/.exec(path) || [];
  return ext || '';
}

// test whether a variable is an object
export function isObject(obj) {
  return Object.prototype.toString.call(obj) === '[object Object]';
}

// returns whether a dark theme is enabled
export function isDarkTheme() {
  return document.documentElement.classList.contains('theme-arc-green');
}

// removes duplicate elements in an array
export function uniq(arr) {
  return Array.from(new Set(arr));
}

const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

// generate a random string
export function random(length) {
  let str = '';
  for (let i = 0; i < length; i++) {
    str += chars.charAt(Math.floor(Math.random() * chars.length));
  }
  return str;
}