├── README.md
└── json-format.js


/README.md:
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 1 | json-format
 2 | ==========
 3 | 
 4 | #### JSON Pretty Printer for JavaScript ####
 5 | 
 6 | I didn't like the "pretty" formatting of JSON.stringify() so I put this together. 
 7 | It is loosely based on a [comment at php.net](http://www.php.net/manual/en/function.json-encode.php#80339).
 8 | 
 9 | 
10 | ### Usage ###
11 | 
12 | 	var formattedJSONString = JSONFormat( someJSONString );


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/json-format.js:
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 1 | /*
 2 | 	json-format v.1.1
 3 | 	http://github.com/phoboslab/json-format
 4 | 
 5 | 	Released under MIT license:
 6 | 	http://www.opensource.org/licenses/mit-license.php
 7 | */
 8 | 
 9 | (function(window) {
10 | 	var p = [],
11 | 		push = function( m ) { return '\\' + p.push( m ) + '\\'; },
12 | 		pop = function( m, i ) { return p[i-1] },
13 | 		tabs = function( count ) { return new Array( count + 1 ).join( '\t' ); };
14 | 
15 | 	window.JSONFormat = function( json ) {
16 | 		p = [];
17 | 		var out = "",
18 | 			indent = 0;
19 | 		
20 | 		// Extract backslashes and strings
21 | 		json = json
22 | 			.replace( /\\./g, push )
23 | 			.replace( /(".*?"|'.*?')/g, push )
24 | 			.replace( /\s+/, '' );		
25 | 		
26 | 		// Indent and insert newlines
27 | 		for( var i = 0; i < json.length; i++ ) {
28 | 			var c = json.charAt(i);
29 | 			
30 | 			switch(c) {
31 | 				case '{':
32 | 				case '[':
33 | 					out += c + "\n" + tabs(++indent);
34 | 					break;
35 | 				case '}':
36 | 				case ']':
37 | 					out += "\n" + tabs(--indent) + c;
38 | 					break;
39 | 				case ',':
40 | 					out += ",\n" + tabs(indent);
41 | 					break;
42 | 				case ':':
43 | 					out += ": ";
44 | 					break;
45 | 				default:
46 | 					out += c;
47 | 					break;      
48 | 			}					
49 | 		}
50 | 		
51 | 		// Strip whitespace from numeric arrays and put backslashes 
52 | 		// and strings back in
53 | 		out = out
54 | 			.replace( /\[[\d,\s]+?\]/g, function(m){ return m.replace(/\s/g,''); } )
55 | 			.replace( /\\(\d+)\\/g, pop ) // strings
56 | 			.replace( /\\(\d+)\\/g, pop ); // backslashes in strings
57 | 		
58 | 		return out;
59 | 	};
60 | })(window);


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