The GWT editor runs validations on translations as they are typed, and immediately displays problems detected by the validators.
The React editor should be able to run any of the standard validators, based on the settings for the project-version (off/warning/error).
List of validators (taken from GWT editor validation options):
- HTML/XML tags
- Java variables
- Leading/trailing newline (\n)
- Positional printf (XSI extension)
- Printf variables
- Tab characters (\t)
- XML entity reference