real-time validation code

noun phrase
UK /ˌrɪəl ˈtaɪm ˌvælɪˈdeɪʃən kəʊd/
US /ˌriːl ˈtaɪm ˌvælɪˈdeɪʃən koʊd/

Code that checks something right away as you type or click, so mistakes are caught instantly.

The sign-up form uses real-time validation code to tell you immediately if your email address is missing an @ sign.

SYNONYMS

instant validation scriptlive checking codeimmediate validation logicon-the-fly validation code

RELATED WORDS

form validationinput checkingerror handlinguser feedbackfront-end code

OTHER MEANINGS

2. Programming that verifies data continuously as it streams in, rather than after it is stored.

The sensor system runs real-time validation code to flag bad readings the moment they arrive.

3. Client-side code that highlights a field in red before the form is submitted.

Thanks to the real-time validation code, the password field turned red while she was still typing.

4. A routine that confirms a value is correct at the exact moment of entry, not later in a batch.

Instead of a nightly check, the app added real-time validation code for every new record.