index.md

How kIsWeb works in Flutter

Do you know how kIsWeb is implemented in Flutter?

Here it is:

const bool kIsWeb = identical(0, 0.0);

Explanation:

• on web, Dart's doubles and ints are backed by the same kind of object (JS doesn't support integers)
• on the Dart VM, doubles and ints are different

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Here's the official documentation:

• kIsWeb top-level constant

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