prefer-extracting-function-callbacks
Warns when an inline callback is passed as an argument to a function or method invocation.
note
For this rule it's recommended to exclude the test
folder.
⚙️ Config
Set allowed-line-count
(default is none) to configure the maximum number of lines after which the rule should trigger.
Set ignored-named-arguments
(default is empty) to ignore specific named parameters.
Set ignored-invocations
(default is empty) to ignore function callbacks in specific invocations.
dart_code_metrics:
...
rules:
...
- prefer-extracting-function-callbacks:
ignored-named-arguments:
- onPressed
allowed-line-count: 3
Example
❌ Bad:
void fn() {
// LINT
listen(onPressed: () {
// Some
// Huge
// Callback
});
}
void listen({
void Function()? onPressed,
}) {}
✅ Good:
void fn() {
listen(onPressed: handlePressed);
}
void handlePressed() {
// Some
// Huge
// Callback
}
void listen({
void Function()? onPressed,
}) {}