Suggest an editImprove this articleRefine the answer for “What is the valid and invalid state?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**`valid`** and **`invalid`** are states that show whether a field (or the whole form) has passed validator checks. **Key point:** these states are used to control interface logic, for example disabling the "Submit" button while the form is `invalid`.Shown above the full answer for quick recall.Answer (EN)Image`valid` and `invalid` are states that show **whether a field (or the whole form) has passed validator checks**. - **valid** - all applied validators pass successfully, there are no errors. - **invalid** - at least one validator returned an error. Example: ```typescript email = new FormControl('', [Validators.required, Validators.email]); ``` If the field is empty: `invalid`, if a correct address is entered: `valid`. These states are used to control interface logic: for example, disabling the "Submit" button while the form is `invalid`.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.