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@termi
Last active Aug 29, 2015
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deep extend
var _hasOwn = Object.prototype.hasOwnProperty;
var _toString = Object.prototype.toString;
var _hasGOPD = typeof Object.getOwnPropertyDescriptor === 'function';
var _hasDP = typeof Object.defineProperty === 'function';
function _getOwnPropertyDescriptor(obj, prop) {
if ( _hasGOPD ) {
return Object.getOwnPropertyDescriptor(obj, prop)
}
else {
return { 'value': obj[prop], 'writable': true, 'configurable': true, 'enumerable': true };
}
}
function _defineProperty(obj, prop, descriptor) {
if ( _hasDP ) {
Object.defineProperty(obj, prop, descriptor);
}
else {
obj[prop] = descriptor['value'];
}
}
function _deepExtend(target) {
for ( var i = 1 ; i < arguments.length ; i++ ) {
var donor = arguments[i];
if ( typeof donor == "object" && donor ) {
for ( var prop in donor ) if ( _hasOwn.call(donor, prop) ) {
var propDesc = _getOwnPropertyDescriptor(donor, prop)
, target_propDesc
;
if ( _toString.call(propDesc.value) == "[object Object]"/* && !(prop in target)*/ ) {
target[prop] = _deepExtend({}, donor[prop]);
}
else if ( _toString.call(propDesc.value) == "[object Array]"/* && !(prop in target)*/ ) {
target[prop] = _deepExtend([], donor[prop]);
}
else if ( !(target_propDesc = _getOwnPropertyDescriptor(target, prop))
|| typeof target_propDesc["value"] !== "object" ) {
if ( !target_propDesc
|| ( "value" in target_propDesc
? target_propDesc["value"] != propDesc["value"]
: target_propDesc["get"] !== propDesc["get"] || target_propDesc["set"] !== propDesc["set"] )
&& target_propDesc["configurable"] !== false
) {
_defineProperty(target, prop, propDesc);
}
}
else {
_deepExtend(target[prop], donor[prop]);
}
};
}
}
return target;
}
module.exports = _deepExtend;
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