Form validation - Flutter quick tips.
To set up Form validation in Flutter:
1. Create a GlobalKey that takes a FormState.
2. Create a Form widget and set the GlobalKey as its key.
3. In the child property of the Form, put all the TextFormFields you need with their respective validators.
4. Create a button to trigger validation of the TextFormFields in the Form through the GlobalKey.
For the full tutorial with the example app, check out the long-form video.
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