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Results for “Forms & validation”
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Replace a path extension
C#: Path.ChangeExtension transforms a path string without moving or creating a file.
C#✓ Tested
Require a nonempty text value
HTML: The required attribute makes an empty text control fail native constraint validation.
HTML✓ Tested
Require a value with NOT NULL
SQL: Declare required fields at the database boundary, not only in application validation.
SQL✓ Tested
Require a value with NOT NULL
SQL Server: Declare required fields at the database boundary, not only in application validation.
SQL Server✓ Tested
Require a value with NOT NULL
Postgres: Declare required fields at the database boundary, not only in application validation.
Postgres✓ Tested
Require a value with NOT NULL
SQLite: Declare required fields at the database boundary, not only in application validation.
SQLite✓ Tested
Type a function’s inputs and output
Catch mismatched arguments during compilation.
function✓ Tested
Validate a field when focus leaves it
jQuery: focusout bubbles and can support delegated form validation.
jQuery✓ Tested