https://enying.eu/js/jquery.number_format.js

1/*
2* @Copyright (c) 2010 Ricardo Andrietta Mendes - [email protected]
3* 
4* Permission is hereby granted, free of charge, to any person
5* obtaining a copy of this software and associated documentation
6* files (the "Software"), to deal in the Software without
7* restriction, including without limitation the rights to use,
8* copy, modify, merge, publish, distribute, sublicense, and/or sell
9* copies of the Software, and to permit persons to whom the
10* Software is furnished to do so, subject to the following
11* conditions:
12* The above copyright notice and this permission notice shall be
13* included in all copies or substantial portions of the Software.
14*
15* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
17* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22* OTHER DEALINGS IN THE SOFTWARE.
23* 
24* How to use it:
25* var formated_value = $().number_format(final_value);
26* 
27* Advanced:
28* var formated_value = $().number_format(final_value, 
29* 													{
30* 													numberOfDecimals:3,
31* 													decimalSeparator: '.',
32* 													thousandSeparator: ',',
33* 													symbol: 'R$'
34* 													});
35*/
36//indica que est� sendo criado um plugin
37jQuery.fn.extend({ //indica que est� sendo criado um plugin
38	
39	number_format: function(numero, params) //indica o nome do plugin que ser� criado com os parametros a serem informados
40		{ 
41		//parametros default
42		var sDefaults = 
43			{			
44			numberOfDecimals: 2,
45			decimalSeparator: ',',
46			thousandSeparator: '.',
47			symbol: ''
48			}
49 
50		//fun��o do jquery que substitui os parametros que n�o foram informados pelos defaults
51		var options = jQuery.extend(sDefaults, params);
52
53		//CORPO DO PLUGIN
54		var number = numero; 
55		var decimals = options.numberOfDecimals;
56		var dec_point = options.decimalSeparator;
57		var thousands_sep = options.thousandSeparator;
58		var currencySymbol = options.symbol;
59		
60		var exponent = "";
61		var numberstr = number.toString ();
62		var eindex = numberstr.indexOf ("e");
63		if (eindex > -1)
64		{
65		exponent = numberstr.substring (eindex);
66		number = parseFloat (numberstr.substring (0, eindex));
67		}
68		
69		if (decimals != null)
70		{
71		var temp = Math.pow (10, decimals);
72		number = Math.round (number * temp) / temp;
73		}
74		var sign = number < 0 ? "-" : "";
75		var integer = (number > 0 ? 
76		  Math.floor (number) : Math.abs (Math.ceil (number))).toString ();
77		
78		var fractional = number.toString ().substring (integer.length + sign.length);
79		dec_point = dec_point != null ? dec_point : ".";
80		fractional = decimals != null && decimals > 0 || fractional.length > 1 ? 
81				   (dec_point + fractional.substring (1)) : "";
82		if (decimals != null && decimals > 0)
83		{
84		for (i = fractional.length - 1, z = decimals; i < z; ++i)
85		  fractional += "0";
86		}
87		
88		thousands_sep = (thousands_sep != dec_point || fractional.length == 0) ? 
89					  thousands_sep : null;
90		if (thousands_sep != null && thousands_sep != "")
91		{
92		for (i = integer.length - 3; i > 0; i -= 3)
93		  integer = integer.substring (0 , i) + thousands_sep + integer.substring (i);
94		}
95		
96		if (options.symbol == '')
97		{
98		return sign + integer + fractional + exponent;
99		}
100		else
101		{
102		return currencySymbol + ' ' + sign + integer + fractional + exponent;
103		}
104		//FIM DO CORPO DO PLUGIN	
105		
106	}
107});