noNegationElse (since v1.0.0)
Diagnostic Category: lint/style/noNegationElse
Source: no-negated-condition
Disallow negation in the condition of an if statement if it has an else clause.
Examples
Section titled ExamplesInvalid
Section titled Invalidif (!cond) { f();} else { g();}style/noNegationElse.js:1:1 lint/style/noNegationElse FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Invert blocks when performing a negation test.
> 1 │ if (!cond) { f();} else { g();}
│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2 │
ℹ Safe fix: Invert the condition and the blocks.
1 │ - if·(!cond)·{·f();}·else·{·g();}
1 │ + if·(cond)·{·g();}·else·{·f();}
2 2 │
!cond ? 0 : 1style/noNegationElse.js:1:1 lint/style/noNegationElse FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Invert blocks when performing a negation test.
> 1 │ !cond ? 0 : 1
│ ^^^^^^^^^^^^^
2 │
ℹ Safe fix: Invert the condition and the blocks.
1 │ - !cond·?·0·:·1
1 │ + cond·?·1·:·0
2 2 │
Valid
Section titled Validif (!cond) { f(); }cond ? 1 : 0if (!cond) { f(); }if (!!val) { f(); } else { g(); }