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no-negated-condition

docs/src/rules/no-negated-condition.md

10.3.0905 B
Original Source

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

Rule Details

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:

::: incorrect

js
/*eslint no-negated-condition: "error"*/

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:

::: correct

js
/*eslint no-negated-condition: "error"*/

if (!a) {
    doSomething();
}

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

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

a ? b : c

:::

Options

This rule has no options.