#no-negated-condition

#Configuration

import { defineConfig, js } from '@rslint/core';

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'no-negated-condition': 'error',
    },
  },
]);

#Rule Details

Negated conditions are more difficult to understand. Code can be made more readable by inverting the condition instead.

This rule disallows negated conditions in either of the following:

• if statements which have an else branch
• ternary expressions

Examples of incorrect code for this rule:

if (!a) {
  doSomething();
} else {
  doSomethingElse();
}

if (a != b) {
  doSomething();
} else {
  doSomethingElse();
}

if (a !== b) {
  doSomething();
} else {
  doSomethingElse();
}

!a ? c : b;

Examples of correct code for this rule:

if (!a) {
  doSomething();
}

if (!a) {
  doSomething();
} else if (b) {
  doSomething();
}

if (a != b) {
  doSomething();
}

a ? b : c;

#Original Documentation

• ESLint: no-negated-condition
• Source code