typescript

TS2722: Cannot invoke possibly undefined

TS2722.*Cannot invoke an object which is possibly 'undefined'

Fixes

1.Add optional call: fn?.()
2.Check function exists before calling
3.Add non-null assertion if certain

TS2722compilerstrictNull

Related Errors

typescript3 fixes

TS2304: Cannot find name 'X'

TS2304.*Cannot find name

•Import the type/value
•Install @types/ package

typescript3 fixes

TS2305: Module has no exported member

TS2305.*has no exported member

•Check export name spelling
•Verify package version has that export

typescript3 fixes

TS2307: Cannot find module or its type declarations

TS2307.*Cannot find module

•Install the package or @types/ package
•Add module declaration in .d.ts file