no-useless-return.md

规则名	规则类型
no-useless-return	suggestion

A return; statement with nothing after it is redundant, and has no effect on the runtime behavior of a function. This can be confusing, so it's better to disallow these redundant statements.

规则详解

This rule aims to report redundant return statements.

此规则的 错误 代码实例：

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

function foo() { return; }

function foo() {
  doSomething();
  return;
}

function foo() {
  if (condition) {
    bar();
    return;
  } else {
    baz();
  }
}

function foo() {
  switch (bar) {
    case 1:
      doSomething();
    default:
      doSomethingElse();
      return;
  }
}

此规则的 正确 代码实例：

::: correct

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

function foo() { return 5; }

function foo() {
  return doSomething();
}

function foo() {
  if (condition) {
    bar();
    return;
  } else {
    baz();
  }
  qux();
}

function foo() {
  switch (bar) {
    case 1:
      doSomething();
      return;
    default:
      doSomethingElse();
  }
}

function foo() {
  for (const foo of bar) {
    return;
  }
}

禁用建议

If you don't care about disallowing redundant return statements, you can turn off this rule.