1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
'use strict';
/* eslint-env browser */
/*! * Module dependencies. */const Document = require('./document.js');const BrowserDocument = require('./browserDocument.js');
let isBrowser = false;
/** * Returns the Document constructor for the current context * * @api private */module.exports = function() {  if (isBrowser) {    return BrowserDocument;  }  return Document;};
/*! * ignore */module.exports.setBrowser = function(flag) {  isBrowser = flag;};