tus-js-client-stall-detection/lib/uuid.ts

A pure JavaScript client for the tus resumable upload protocol (fork with stall detection)

/**
 * Generate a UUID v4 based on random numbers. We intentioanlly use the less
 * secure Math.random function here since the more secure crypto.getRandomNumbers
 * is not available on all platforms.
 * This is not a problem for us since we use the UUID only for generating a
 * request ID, so we can correlate server logs to client errors.
 *
 * This function is taken from following site:
 * https://stackoverflow.com/questions/105034/create-guid-uuid-in-javascript
 *
 * @return {string} The generate UUID
 */
export function uuid(): string {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
    const r = (Math.random() * 16) | 0
    const v = c === 'x' ? r : (r & 0x3) | 0x8
    return v.toString(16)
  })
}