eslint/no-lonely-if Pedantic

🚧 An auto-fix is planned for this rule, but not implemented at this time.

Disallow if statements as the only statement in else blocks.

When an if statement is the only statement in an else block, it is often clearer to use an else if instead.

Examples of incorrect code for this rule:

if (condition) {
  // ...
} else {
  if (anotherCondition) {
    // ...
  }
}

if (condition) {
  // ...
} else {
  if (anotherCondition) {
    // ...
  } else {
    // ...
  }
}

Examples of correct code for this rule:

if (condition) {
  // ...
} else if (anotherCondition) {
  // ...
}

if (condition) {
  // ...
} else if (anotherCondition) {
  // ...
} else {
  // ...
}

if (condition) {
  // ...
} else {
  if (anotherCondition) {
    // ...
  }
  doSomething();
}

How to use

To enable this rule using the config file or in the CLI, you can use:

Config (.oxlintrc.json)Config (oxlint.config.ts)CLI

json

{
  "rules": {
    "no-lonely-if": "error"
  }
}

import { defineConfig } from "oxlint";

export default defineConfig({
  rules: {
    "no-lonely-if": "error",
  },
});

bash

oxlint --deny no-lonely-if

This rule was added in v0.16.0.