javascript

ReferenceError: Super constructor called twice

Super constructor may only be called once

Fixes

1.Call super() only once in constructor
2.Remove duplicate super() call
3.Check class inheritance chain

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