javascript

TypeError: Proxy getPrototypeOf must return object or null

'getPrototypeOf'.*trap.*returned neither an object nor null

Fixes

1.Return object or null from getPrototypeOf trap
2.Use Reflect.getPrototypeOf as fallback
3.Check target's prototype chain

TypeErrorruntimeproxy

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