Results for “for”
Small, practical examples. Search by task or narrow things down below.
Validate a field when focus leaves it
Validate a field when focus leaves it with a standalone Angular component and explicit browser behavior.
Angular✓ Tested
Validate a finite numeric value without coercion
JavaScript: Number.isFinite rejects numeric strings as well as NaN and infinity.
JavaScript✓ Tested
Validate a finite numeric value without coercion
TypeScript: Number.isFinite rejects numeric strings as well as NaN and infinity.
TypeScript✓ Tested
Validate a required argument
Java: Use requireNonNull with a useful message at an API boundary.
Java✓ Tested
Validate a simple C-style ASCII identifier
C: Check the first character separately from subsequent characters and reject empty input.
C✓ Tested
Validate a small stored payload with a checksum
Arduino / C: Store a checksum with the payload and reject a changed byte.
Arduino / C✓ Tested
Validate a structured text identifier
HTML: The pattern attribute matches the entire nonempty input; required handles the empty case.
HTML✓ Tested
Validate a whole ASCII identifier
JavaScript: Use an anchored expression without the multiline flag and reject a trailing line break explicitly.
JavaScript✓ Tested
Validate a whole ASCII identifier
TypeScript: Use an anchored expression without the multiline flag and reject a trailing line break explicitly.
TypeScript✓ Tested
Validate access through a custom context hook
Validate access through a custom context hook with a small React component and explicit browser behavior.
React✓ Tested
Validate an argument at a method boundary
C#: ThrowIfNegative gives callers an explicit argument error for an invalid range.
C#✓ Tested
Validate an email input
Use browser constraint validation for a required HTML email field.
HTML✓ Tested