'use strict';
/* global Bun, Deno -- detection */
var globalThis = require('../internals/global-this');
var userAgent = require('../internals/environment-user-agent');
var classof = require('../internals/classof-raw');

var userAgentStartsWith = function (string) {
  return userAgent.slice(0, string.length) === string;
};

module.exports = (function () {
  if (userAgentStartsWith('Bun/')) return 'BUN';
  if (userAgentStartsWith('Cloudflare-Workers')) return 'CLOUDFLARE';
  if (userAgentStartsWith('Deno/')) return 'DENO';
  if (userAgentStartsWith('Node.js/')) return 'NODE';
  if (globalThis.Bun && typeof Bun.version == 'string') return 'BUN';
  if (globalThis.Deno && typeof Deno.version == 'object') return 'DENO';
  if (classof(globalThis.process) === 'process') return 'NODE';
  if (globalThis.window && globalThis.document) return 'BROWSER';
  return 'REST';
})();