CODEWITHSUNDEEP
flutter
user482594
user482594

Reputation: 17486

Why does Flutter doc ask you to use GlobalKey when creating Form instead of other types of keys?

According to flutter doc, https://flutter.dev/docs/cookbook/forms/validation, it says the following.

When creating the form, provide a GlobalKey.

However, GlobalKey doc says that this key is expensive and recommend developers to use other types of keys.

consider using a Key, ValueKey, ObjectKey, or UniqueKey (instead of globalKey)

What is the merit of using GlobalKey for Form?

Upvotes: 0

Views: 663

Answers (1)

user6274128
user6274128

Reputation:

The docs are pretty self explanatory I think.

GlobalKey: A key that is unique across the entire app.

And when you create a Form you want it to be unique, and using GlobalKey you can identify the form.

And docs warn you to avoid GlobalKey at multiple places, like if you are using a ListView and you assign every children GlobalKey, it is a bad approach, however there is no harm of using GlobalKey if you are using it carefully.

Upvotes: 3

Related Questions