avoid_js_rounded_ints

Integer literal can't be represented exactly when compiled to JavaScript.

The analyzer produces this diagnostic when an int literal's value can't be represented exactly as a JavaScript Number.

When Dart code is compiled to JavaScript, integers whose values fall outside the range -(2^53 - 1) to 2^53 - 1 might be rounded to the nearest representable value. This silently changes the literal's value on the web.

To learn more about how Dart represents numbers on different platforms, including when compiled to JavaScript, check out Numbers in Dart.

The following code produces this diagnostic because the literal 9007199254740993 (2^53 + 1) can't be represented exactly as a JavaScript Number is rounded to 9007199254740992 at run time when compiled to JavaScript:

final i = 9007199254740993;

If the value needs to be exact on all platforms, including when compiled to JavaScript, then use a BigInt to represent it:

final i = BigInt.parse('9007199254740993');