Skip to main content

unnecessary-trailing-comma

added in: 1.2.0
style
⚙️🛠
preset: recommended

Checks for unnecessary trailing commas for arguments, parameters, enum values and collections.

Removing those commas results in dart format producing code that fits on one line.

⚙️ Config​

Set max-width (default is 80) to configure a custom max line width.

Set multiline (default is false) to highlight an unnecessary comma for arguments that take more than one line and are last.

Set trailing-lists (default is false) to highlight an unnecessary comma for list, set or map literals that are the last argument of an invocation.

dart_code_metrics:
  ...
  rules:
    ...
    - unnecessary-trailing-comma:
        max-width: 100

Example​

❌ Bad:

// LINT
void function(
    String first,
    String second,
) {
  return;
}

✅ Good:

void function(String first, String second) {
  return;
}