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Frontend-Learner/node_modules/reserved-identifiers/readme.md

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+# reserved-identifiers
+
+> Provides a list of [reserved identifiers](https://262.ecma-international.org/14.0/#sec-keywords-and-reserved-words) for JavaScript
+
+It assumes the latest JavaScript version (ES2023) and module context. Supporting older JavaScript versions is a non-goal.
+
+## Install
+
+```sh
+npm install reserved-identifiers
+```
+
+## Usage
+
+```js
+import reservedIdentifiers from 'reserved-identifiers';
+
+const identifiers = reservedIdentifiers();
+const isReserved = identifier => identifiers.has(identifier);
+
+console.log(isReserved('await'));
+//=> true
+```
+
+## API
+
+### reservedIdentifiers(options?)
+
+Returns a `Set` with the identifiers.
+
+#### options
+
+Type: `object`
+
+##### includeGlobalProperties
+
+Type: `boolean`\
+Default: `false`
+
+Include the [global properties](https://tc39.es/ecma262/#sec-value-properties-of-the-global-object) `globalThis`, `Infinity`, `NaN`, and `undefined`. Although not officially reserved, they should typically [not be used as identifiers](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined#sect1).
+
+### typeScriptReservedTypes()
+
+Returns a `Set` with TypeScript's built-in types that are reserved and cannot be used for type names (interfaces, type aliases, enums, classes, type parameters).
+
+```js
+import {typeScriptReservedTypes} from 'reserved-identifiers';
+
+const types = typeScriptReservedTypes();
+
+console.log(types.has('any'));
+//=> true
+
+console.log(types.has('unknown'));
+//=> true
+```
+
+## Related
+
+- [is-identifier](https://github.com/sindresorhus/is-identifier) - Check if a string is a valid JavaScript identifier