Note that the return value is a type predicate, which means isRef can be used as a type guard
Two, unref()
Returns the internal value if the argument is a ref, otherwise returns the argument itself.
This is a syntactic sugar for val = isRef(val) ? val.value : valcompute .
3. toRef()
Based on a property on the reactive object, create a corresponding ref.
A ref thus created is kept in sync with its source property: changing the source property's value will update the ref's value, and vice versa.
Note that this is different from:
toRef() This function is useful when you want to pass a prop's ref to a composite function:
4. toRefs()
Convert a reactive object to a normal object, each property of this normal object is a ref pointing to the corresponding property of the source object.
Each individual ref is created using toRef().
toRefs is useful when returning reactive objects from composite functions.
Using it, consumer components can destructure/unwrap the returned object without losing responsiveness:
5. isProxy()
Checks if an object is a proxy created by reactive(), readonly(), shallowReactive() or shallowReadonly().
6. isReactive()
Checks if an object was a proxy created with reactive() or shallowReactive().
7. isReadonly()
Checks if the value passed in is a read-only object. Properties of read-only objects can be changed, but they cannot be assigned directly by the passed object.
Proxies created via readonly() and shallowReadonly() are read-only because they are computed() refs without a set function.
