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In JavaScript primitive types are passed around as values: meaning that each time a value is assigned, a copy of that value is created. On the other side objects (including plain objects, array, functions, class instances) are references.
No. In fact, there are no "reference" types in JavaScript1 and there is definitely not Reference semantics for variables.
An object variable is always a reference-type. It's possible for object to "reference" a value-type by the power of boxing.
The object is the value. While, it should be noted that the primitive values such as number and string cannot have additional properties assigned (the assignment is ignored) while the wrapper Objects Number and String are full-fledged objects.
Are javascript objects value based or reference based? For example:
obj1.list =new array();
// ------ populate list
obj2.list = obj1.list
Does the browser make different copy of the obj1.list for obj2.list, or is obj2.list just a reference to obj1.list?
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