Website Structure

Frontend-Learner/node_modules/reserved-identifiers/index.js

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+// https://262.ecma-international.org/14.0/#sec-keywords-and-reserved-words
+// 14 is ES2023
+const identifiers = [
+	// Keywords
+	'await',
+	'break',
+	'case',
+	'catch',
+	'class',
+	'const',
+	'continue',
+	'debugger',
+	'default',
+	'delete',
+	'do',
+	'else',
+	'enum',
+	'export',
+	'extends',
+	'false',
+	'finally',
+	'for',
+	'function',
+	'if',
+	'import',
+	'in',
+	'instanceof',
+	'new',
+	'null',
+	'return',
+	'super',
+	'switch',
+	'this',
+	'throw',
+	'true',
+	'try',
+	'typeof',
+	'var',
+	'void',
+	'while',
+	'with',
+	'yield',
+
+	// Future reserved keywords (strict mode)
+	'implements',
+	'interface',
+	'let',
+	'package',
+	'private',
+	'protected',
+	'public',
+	'static',
+
+	// Not keywords, but still restricted
+	'arguments',
+	'eval',
+];
+
+// https://262.ecma-international.org/14.0/#sec-value-properties-of-the-global-object
+const globalProperties = [
+	'globalThis',
+	'Infinity',
+	'NaN',
+	'undefined',
+];
+
+// These are TypeScript's built-in types that are reserved and cannot be used for type names
+const typeScriptTypes = [
+	'any',
+	'bigint',
+	'boolean',
+	'never',
+	'null',
+	'number',
+	'object',
+	'string',
+	'symbol',
+	'undefined',
+	'unknown',
+	'void',
+];
+
+export default function reservedIdentifiers({includeGlobalProperties = false} = {}) {
+	return new Set([
+		...identifiers,
+		...(includeGlobalProperties ? globalProperties : []),
+	]);
+}
+
+export function typeScriptReservedTypes() {
+	return new Set(typeScriptTypes);
+}