noNegationElse (since v0.7.0)

Disallow negation in the condition of an if statement if it has an else clause

Examples

Invalid

if (!true) {consequent;} else {alternate;}

warning[js/noNegationElse]: Invert blocks when performing a negation test.
  ┌─ js/noNegationElse.js:1:1
  │
1 │ if (!true) {consequent;} else {alternate;}
  │ ------------------------------------------

Suggested fix: Exchange alternate and consequent of the node
    | @@ -1 +1 @@
0   | - if (!true) {consequent;} else {alternate;}
  0 | + if (true) {alternate;} else {consequent;}

!true ? consequent : alternate

warning[js/noNegationElse]: Invert blocks when performing a negation test.
  ┌─ js/noNegationElse.js:1:1
  │
1 │ !true ? consequent : alternate
  │ ------------------------------

Suggested fix: Exchange alternate and consequent of the node
    | @@ -1 +1 @@
0   | - !true ? consequent : alternate
  0 | + true ? alternate : consequent

Valid

if (!true) {consequent;}

true ? consequent : alternate