avoid_double_and_int_checks.md

Pattern: Use of double/int check

Issue: -

Description

When compiled to JS, integer values are represented as floats. That can lead to some unexpected behavior when using either is or is! where the type is either int or double.

Example of incorrect code:

f(num x) {
 if (x is double) {
  ...
 } else if (x is int) {
  ...
 }
}

Example of correct code:

f(dynamic x) {
 if (x is num) {
  ...
 } else {
  ...
 }
}

Further Reading

• Linter for Dart - avoid_double_and_int_checks