copy

Get a copy of current state.

@parameters

Name	Type	Description
stateProp	string	Optional. Specific property of state.

@return

Type	Description
any	New copy of state or property of state.

Examples:

Copying the whole state

const store = new NgStore({foo: 2, bar: 1});

// { foo: 2, bar: 1 }
const stateCopy = store.copy();

Copying specific property of state

const store = new NgStore({foo: {bar: 3, baz: 4}});

// { bar: 3, baz: 4 }
const fooCopy = store.copy('foo');