Glossary term
What is idempotent? Meaning for developers
Doing it once or many times gives the same result, so a retry is safe. PUT and DELETE are idempotent. POST is not.
Learn it properly · The Browser ContractLesson 6: HTTP Semantics Interviewers Ask: Methods, Idempotency, Status Codes, RedirectsSafe vs idempotent methods, 401 vs 403, 409, 422 and 429, and the 301/302/307/308 table. All based on the HTTP specification.