JS: typeof, instanceof, .constructor

typeof operator return the type of the object, but array, object, date, regex, etc all just return "object".

• JS: typeof (operator)

instanceof operator checks if a object is in the Prototype Chain of a function's property "prototype"'s value.

• JS: instanceof (operator)

Property key "constructor" is meant to return the function that created the object.

• JS: constructor (property)

🟢 TIP: You shoud avoid using any of them, because they are not reliable.

Instead, check directly what you are looking for, by:

• Check what is the parent object.
• Check for properties you are looking for.
• Check for the exact “subtype” of a object.

• JS: Get Set Prototype
• JS: Check Property Existence
• JS: Find Object's sub-type