1  /*!
 2   * word-wrap <https://github.com/jonschlinkert/word-wrap>
 3   *
 4   * Copyright (c) 2014-2017, Jon Schlinkert.
 5   * Released under the MIT License.
 6   */
 7  
 8  module.exports = function(str, options) {
 9    options = options || {};
10    if (str == null) {
11      return str;
12    }
13  
14    var width = options.width || 50;
15    var indent = (typeof options.indent === 'string')
16      ? options.indent
17      : '  ';
18  
19    var newline = options.newline || '\n' + indent;
20    var escape = typeof options.escape === 'function'
21      ? options.escape
22      : identity;
23  
24    var regexString = '.{1,' + width + '}';
25    if (options.cut !== true) {
26      regexString += '([\\s\u200B]+|$)|[^\\s\u200B]+?([\\s\u200B]+|$)';
27    }
28  
29    var re = new RegExp(regexString, 'g');
30    var lines = str.match(re) || [];
31    var result = indent + lines.map(function(line) {
32      if (line.slice(-1) === '\n') {
33        line = line.slice(0, line.length - 1);
34      }
35      return escape(line);
36    }).join(newline);
37  
38    if (options.trim === true) {
39      result = result.replace(/[ \t]*$/gm, '');
40    }
41    return result;
42  };
43  
44  function identity(str) {
45    return str;
46  }