How can I create an exact copy of object? Is there a simple technique
that would allow me to preserve:
- non-enumerable properties
- getter and setter methods
- entire prototype chain
- circular references (if any)
There is Object.create() in ES5 which copies nicely the whole
prototype chain, but I'm not sure how to copy properties that belong
to the top level object. Using "for in" loop like below would skip
non-enumerable properties and would copy the values returned by
getters (instead of getter functions itself).
function copy(refObject) {
var newObject = Object.create(Object.getPrototypeOf(refObject));
var property;
for (property in refObject) {
if (refObject.hasOwnProperty(property)) {
newObject[property] = refObject[property];
}
}
return newObject;
}
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