javascript

ReferenceError: Must call super in derived class

Must call super constructor in derived class

Fixes

1.Add super() call at top of constructor
2.Call super before accessing this
3.Ensure parent class constructor runs

ReferenceErrorruntimeclass

Related Errors

javascript3 fixes

Cannot read property of undefined

Cannot read propert(y|ies) of undefined

•Add optional chaining (?.)
•Check if object exists before accessing

javascript3 fixes

Cannot read property of null

Cannot read propert(y|ies) of null

•Add null check before access
•Use optional chaining (?.)

javascript3 fixes

TypeError: X is not a function

is not a function

•Check spelling of method name
•Verify import is correct