useShorthandAssign (since v1.3.0)
Diagnostic Category: lint/style/useShorthandAssign
Sources:
- Same as:
operator-assignment
Require assignment operator shorthand where possible.
JavaScript provides shorthand operators combining a variable assignment and simple mathematical operation.
Examples
Section titled ExamplesInvalid
Section titled Invalida = a + 1;style/useShorthandAssign.js:1:1 lint/style/useShorthandAssign FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Assignment (=) can be replaced with operator assignment +=.
> 1 │ a = a + 1;
│ ^^^^^^^^^
2 │
ℹ Unsafe fix: Use += instead.
1 │ - a·=·a·+·1;
1 │ + a·+=·1;
2 2 │
a = a - 1;style/useShorthandAssign.js:1:1 lint/style/useShorthandAssign FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Assignment (=) can be replaced with operator assignment -=.
> 1 │ a = a - 1;
│ ^^^^^^^^^
2 │
ℹ Unsafe fix: Use -= instead.
1 │ - a·=·a·-·1;
1 │ + a·-=·1;
2 2 │
a = a * 1;style/useShorthandAssign.js:1:1 lint/style/useShorthandAssign FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Assignment (=) can be replaced with operator assignment *=.
> 1 │ a = a * 1;
│ ^^^^^^^^^
2 │
ℹ Unsafe fix: Use *= instead.
1 │ - a·=·a·*·1;
1 │ + a·*=·1;
2 2 │
Valid
Section titled Valida += 1;a -= 1;a *= 1;