Key JavaScript Concepts | Constructor Functions
Hello,
I'm following Key JavaScript Concepts lesson, and I'm at page 4, where setting up a prototype chain with constructor functions are being studied.
However, I guess there is an issue with the use of util.inherits
. When I copy pasted the example first, I got an error stating that:
TypeError [ERR_INVALID_ARG_TYPE]: The "superCtor.prototype" property must be of type object. Received undefined
So I guess, the correct usage is as follows:util.inherits(Dog, Wolf)
instead of util.inherits(Dog.prototype, Wolf.prototype)
Also I guess it would be better if the lesson emphasizes that it is a legacy function and the usage is discouraged. ( https://nodejs.org/docs/latest-v14.x/api/util.html#util_util_inherits_constructor_superconstructor )
Best Answer
-
I posted the same issue too.
util.inherits(Dog, Wolf)
should be correct.0
Answers
-
thanks @toramanomer and @krave - totally correct, this is being fixed
1
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