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Fix BigInt literal error in ambient contexts when targeting < ES2020 (#61935)

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: RyanCavanaugh <6685088+RyanCavanaugh@users.noreply.github.com>
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Copilot
2025-06-25 14:29:50 -07:00
committed by GitHub
co-authored by RyanCavanaugh
parent 1ed8674bba
commit 6e519c59c1
6 changed files with 108 additions and 1 deletions
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src/compiler/checker.ts
+2 -1
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@@ -53188,7 +53188,8 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
const literalType = isLiteralTypeNode(node.parent) ||
isPrefixUnaryExpression(node.parent) && isLiteralTypeNode(node.parent.parent);
if (!literalType) {
if (languageVersion < ScriptTarget.ES2020) {
// Don't error on BigInt literals in ambient contexts
if (!(node.flags & NodeFlags.Ambient) && languageVersion < ScriptTarget.ES2020) {
if (grammarErrorOnNode(node, Diagnostics.BigInt_literals_are_not_available_when_targeting_lower_than_ES2020)) {
return true;
}