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Fixed an issue in boolean comparison narrowing when the reference is an optional chain (#56504)

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Mateusz Burzyński
2023-11-22 11:01:10 -08:00
committed by GitHub
parent 6f9d34985d
commit d4fbc9b57d
5 changed files with 303 additions and 2 deletions
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src/compiler/checker.ts
+2 -2
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@@ -27930,10 +27930,10 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
if (isMatchingConstructorReference(right)) {
return narrowTypeByConstructor(type, operator, left, assumeTrue);
}
if (isBooleanLiteral(right)) {
if (isBooleanLiteral(right) && !isAccessExpression(left)) {
return narrowTypeByBooleanComparison(type, left, right, operator, assumeTrue);
}
if (isBooleanLiteral(left)) {
if (isBooleanLiteral(left) && !isAccessExpression(right)) {
return narrowTypeByBooleanComparison(type, right, left, operator, assumeTrue);
}
break;