no-useless-catch.md

规则名	规则类型
no-useless-catch	suggestion

A catch clause that only rethrows the original error is redundant, and has no effect on the runtime behavior of the program. These redundant clauses can be a source of confusion and code bloat, so it's better to disallow these unnecessary catch clauses.

规则详解

This rule reports catch clauses that only throw the caught error.

此规则的 错误 代码实例：

/*eslint no-useless-catch: "error"*/

try {
  doSomethingThatMightThrow();
} catch (e) {
  throw e;
}

try {
  doSomethingThatMightThrow();
} catch (e) {
  throw e;
} finally {
  cleanUp();
}

此规则的 正确 代码实例：

::: correct

/*eslint no-useless-catch: "error"*/

try {
  doSomethingThatMightThrow();
} catch (e) {
  doSomethingBeforeRethrow();
  throw e;
}

try {
  doSomethingThatMightThrow();
} catch (e) {
  handleError(e);
}

try {
  doSomethingThatMightThrow();
} finally {
  cleanUp();
}

禁用建议

If you don't want to be notified about unnecessary catch clauses, you can safely disable this rule.