javascript

TypeError: Private member access on wrong class

Cannot read private member .* from an object whose class did not declare it

Fixes

1.Ensure object is instance of declaring class
2.Use instanceof check before access
3.Don't access private fields on subclass instances from parent

TypeErrorruntimeclass

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