typescript type_error ai_generated true

error TS2741: Property 'x' is missing in type 'A' but required in type 'B'

ID: typescript/ts2741-missing-property

Also available as: JSON · Markdown
92%Fix Rate
93%Confidence
50Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
5 active — — —

Root Cause

Object literal missing required property. Common with React props and API payloads.

generic

Workarounds

  1. 95% success Add the missing property to the object 
    // Add the missing property directly:
const config: AppConfig = {
  host: 'localhost',
  port: 3000,
  debug: false  // <-- was missing
};

    Sources: https://www.typescriptlang.org/docs/handbook/2/objects.html

  2. 88% success Use Partial<T> if all properties should be optional 
    // When building objects incrementally:
function createConfig(overrides: Partial<AppConfig>): AppConfig {
  return { ...defaults, ...overrides };
}
// Or for component props:
type Props = Partial<FullProps> & { id: string };

    Sources: https://www.typescriptlang.org/docs/handbook/utility-types.html#partialtype

Dead Ends

Common approaches that don't work:

  1. Make all properties optional with Partial<T> 70% fail

    Removes all required field guarantees

  2. Add as Type assertion 75% fail

    Bypasses check, will fail at runtime

Error Chain

Leads to:
Preceded by:
Frequently confused with: