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Lint Rules

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;}
style/noNegationElse.js:1:1 lint/style/noNegationElse  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ Invert blocks when performing a negation test.
  
  > 1 │ if (!true) {consequent;} else {alternate;}
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Suggested fix: Exchange alternate and consequent of the node
  
    1   │ - if·(!true)·{consequent;}·else·{alternate;}
      1 │ + if·(true)·{alternate;}·else·{consequent;}
    2 2 │   
  

!true ? consequent : alternate
style/noNegationElse.js:1:1 lint/style/noNegationElse  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ Invert blocks when performing a negation test.
  
  > 1 │ !true ? consequent : alternate
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Suggested fix: Exchange alternate and consequent of the node
  
    1   │ - !true·?·consequent·:·alternate
      1 │ + true·?·alternate·:·consequent
    2 2 │

Valid

if (!true) {consequent;}
true ? consequent : alternate