Show validation errors for your custom fields
We recently added an additional package to our open source field editors that will enable you to enrich fields used in custom apps with it's corresponding errors.
By pulling in @contentful/field-editor-validation-errors into your project you can easily render a list of the error messages of a particular field to indicate what is wrong with the input.

Resources
- Field editors source code
- Guides and examples
- Reference documentation on field editors