javascript

SyntaxError: Cannot assign to optional chaining expression

Optional chaining.*cannot.*assign

Fixes

1.Check existence first, then assign separately
2.Use if statement for null check
3.Don't use ?. on left side of assignment

SyntaxErrorruntimeoptional-chaining

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