avoid_js_rounded_ints

Avoid JavaScript rounded ints.

This rule is available as of Dart 2.0.0.

Details

AVOID integer literals that cannot be represented exactly when compiled to JavaScript.

When a program is compiled to JavaScript int and double become JavaScript Numbers. Too large integers (value < Number.MIN_SAFE_INTEGER or value > Number.MAX_SAFE_INTEGER) may be rounded to the closest Number value.

For instance 1000000000000000001 cannot be represented exactly as a JavaScript Number, so 1000000000000000000 will be used instead.

BAD:

int value = 9007199254740995;

GOOD:

BigInt value = BigInt.parse('9007199254740995');

Usage

To enable the avoid_js_rounded_ints rule, add avoid_js_rounded_ints under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - avoid_js_rounded_ints