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Skip CFA on obj[key] where key isn't a known property name

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This commit is contained in:
Anders Hejlsberg 2024-03-16 07:41:37 -07:00
parent 9866640f92
commit e74dd02e08
1 changed files with 3 additions and 0 deletions
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3
src/compiler/checker.ts
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@ -33183,6 +33183,9 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
return getFlowTypeOfProperty(node, prop);
}
propType = getNarrowableTypeForReference(propType, node, checkMode);
if (isElementAccessExpression(node) && !tryGetElementAccessExpressionName(node)) {
return propType;
}
// If strict null checks and strict property initialization checks are enabled, if we have
// a this.xxx property access, if the property is an instance property without an initializer,
// and if we are in a constructor of the same class as the property declaration, assume that