javascript

ReferenceError: X is not defined

is not defined

Fixes

1.Import or declare the variable
2.Check for typos in variable name
3.Verify script load order

ReferenceErrorruntimescope

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