Provides a list of reserved identifiers for JavaScript
npm install reserved-identifiers> Provides a list of reserved identifiers for JavaScript
It assumes the latest JavaScript version (ES2023) and module context. Supporting older JavaScript versions is a non-goal.
``sh`
npm install reserved-identifiers
`js
import reservedIdentifiers from 'reserved-identifiers';
const identifiers = reservedIdentifiers();
const isReserved = identifier => identifiers.has(identifier);
console.log(isReserved('await'));
//=> true
`
Returns a Set with the identifiers.
#### options
Type: object
##### includeGlobalProperties
Type: boolean\false
Default:
Include the global properties globalThis, Infinity, NaN, and undefined. Although not officially reserved, they should typically not be used as identifiers.
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
``
- is-identifier - Check if a string is a valid JavaScript identifier