message-on-change

noun
UK /ˈmɛsɪdʒ ɒn tʃeɪndʒ/
US /ˈmɛsɪdʒ ɑn tʃeɪndʒ/

A message that is sent when something changes.

The app uses a message-on-change to tell the screen to update.


OTHER MEANINGS

2. A setting that makes a program send a message whenever a value changes.

Turn on message-on-change so the form saves automatically.

3. A signal in a computer system that announces a change to other parts.

The database sends a message-on-change to keep the backup in sync.

4. A way to keep two things matching by sending news of every change.

With message-on-change, the two lists always stay the same.