bem
Version:
61 lines (57 loc) • 2.01 kB
JavaScript
(function(undefined) {
if(window.JSON) return;
var _toString = Object.prototype.toString,
escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
meta = {
'\b' : '\\b',
'\t' : '\\t',
'\n' : '\\n',
'\f' : '\\f',
'\r' : '\\r',
'"' : '\\"',
'\\' : '\\\\'
},
stringify;
window.JSON = {
stringify : stringify = function(val) {
if(val === null) {
return 'null';
}
if(typeof val === 'undefined') {
return undefined;
}
switch(_toString.call(val)) {
case '[object String]':
return '"' +
(escapable.test(val)?
val.replace(escapable, function(a) {
var c = meta[a];
return typeof c === 'string'? c : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
}) :
val) +
'"';
case '[object Number]':
case '[object Boolean]':
return '' + val;
case '[object Array]':
var res = '[', i = 0, len = val.length, strVal;
while(i < len) {
strVal = stringify(val[i]);
res += (i++? ',' : '') + (typeof strVal === 'undefined'? 'null' : strVal);
}
return res + ']';
case '[object Object]':
var res = '{', i = 0, strVal;
for(var key in val) {
if(val.hasOwnProperty(key)) {
strVal = stringify(val[key]);
typeof strVal !== 'undefined' && (res += (i++? ',' : '') + '"' + key + '":' + strVal);
}
}
return res + '}';
default:
return undefined;
}
}
};
})();