# bare-type stable [`bare-type`](https://github.com/holepunchto/bare-type) — Cross-realm type predicates for Bare. It is a native addon and requires Bare `>=1.32.0`. ```sh npm i bare-type ``` ## Usage [#usage] ```js const type = require('bare-type') if (type(123).isNumber()) { console.log(123, 'is a number') } ``` ## API [#api] ### Type [#type] #### `new Type(type: number)` [#new-typetype-number] **Parameters** | Parameter | Type | Default | Description | | --------- | -------- | ------- | ----------- | | `type` | `number` | — | — | #### `isArguments(): boolean` [#isarguments-boolean] #### `isArray(): boolean` [#isarray-boolean] #### `isArrayBuffer(): boolean` [#isarraybuffer-boolean] #### `isAsyncFunction(): boolean` [#isasyncfunction-boolean] #### `isAsyncGeneratorFunction(): boolean` [#isasyncgeneratorfunction-boolean] #### `isBigInt(): boolean` [#isbigint-boolean] #### `isBigInt64Array(): boolean` [#isbigint64array-boolean] #### `isBigIntObject(): boolean` [#isbigintobject-boolean] #### `isBigUint64Array(): boolean` [#isbiguint64array-boolean] #### `isBoolean(): boolean` [#isboolean-boolean] #### `isBooleanObject(): boolean` [#isbooleanobject-boolean] #### `isDataView(): boolean` [#isdataview-boolean] #### `isDate(): boolean` [#isdate-boolean] #### `isError(): boolean` [#iserror-boolean] #### `isExternal(): boolean` [#isexternal-boolean] #### `isFloat16Array(): boolean` [#isfloat16array-boolean] #### `isFloat32Array(): boolean` [#isfloat32array-boolean] #### `isFloat64Array(): boolean` [#isfloat64array-boolean] #### `isFunction(): boolean` [#isfunction-boolean] #### `isGenerator(): boolean` [#isgenerator-boolean] #### `isGeneratorFunction(): boolean` [#isgeneratorfunction-boolean] #### `isInt16Array(): boolean` [#isint16array-boolean] #### `isInt32(): boolean` [#isint32-boolean] #### `isInt32Array(): boolean` [#isint32array-boolean] #### `isInt8Array(): boolean` [#isint8array-boolean] #### `isMap(): boolean` [#ismap-boolean] #### `isModuleNamespace(): boolean` [#ismodulenamespace-boolean] #### `isNull(): boolean` [#isnull-boolean] #### `isNumber(): boolean` [#isnumber-boolean] #### `isNumberObject(): boolean` [#isnumberobject-boolean] #### `isObject(): boolean` [#isobject-boolean] #### `isPromise(): boolean` [#ispromise-boolean] #### `isProxy(): boolean` [#isproxy-boolean] #### `isRegExp(): boolean` [#isregexp-boolean] #### `isSet(): boolean` [#isset-boolean] #### `isSharedArrayBuffer(): boolean` [#issharedarraybuffer-boolean] #### `isString(): boolean` [#isstring-boolean] #### `isStringObject(): boolean` [#isstringobject-boolean] #### `isSymbol(): boolean` [#issymbol-boolean] #### `isSymbolObject(): boolean` [#issymbolobject-boolean] #### `isTypedArray(): boolean` [#istypedarray-boolean] #### `isUint16Array(): boolean` [#isuint16array-boolean] #### `isUint32(): boolean` [#isuint32-boolean] #### `isUint32Array(): boolean` [#isuint32array-boolean] #### `isUint8Array(): boolean` [#isuint8array-boolean] #### `isUint8ClampedArray(): boolean` [#isuint8clampedarray-boolean] #### `isUndefined(): boolean` [#isundefined-boolean] #### `isWeakMap(): boolean` [#isweakmap-boolean] #### `isWeakRef(): boolean` [#isweakref-boolean] #### `isWeakSet(): boolean` [#isweakset-boolean] ### Functions [#functions] #### `type(value: unknown): Type` [#typevalue-unknown-type] Return a `Type` wrapping `value`, exposing `is*()` predicates to test its runtime type across realms. **Parameters** | Parameter | Type | Default | Description | | --------- | --------- | ------- | --------------------------- | | `value` | `unknown` | — | The value to wrap and test. | #### `type.of(value: unknown): number` [#typeofvalue-unknown-number] Return the runtime type of `value` as a number, for callers that would otherwise walk a long chain of predicates and can switch on it instead. Every constant carries its base type, so `constants.ARRAY` matches an array outright. **Parameters** | Parameter | Type | Default | Description | | --------- | --------- | ------- | ------------------ | | `value` | `unknown` | — | The value to test. | ### Constants and variables [#constants-and-variables] #### `type.constants: Constants` [#typeconstants-constants] The type constants that `of()` returns. ### Types [#types] #### `Constants` [#constants] ```ts interface Constants { readonly UNDEFINED: number readonly NULL: number readonly BOOLEAN: number readonly NUMBER: number readonly STRING: number readonly SYMBOL: number readonly OBJECT: number readonly FUNCTION: number readonly EXTERNAL: number readonly BIGINT: number readonly INT32: number readonly UINT32: number readonly ARRAY: number readonly ARGUMENTS: number readonly DATE: number readonly REGEXP: number readonly ERROR: number readonly PROMISE: number readonly PROXY: number readonly GENERATOR: number readonly MAP: number readonly SET: number readonly WEAK_MAP: number readonly WEAK_SET: number readonly WEAK_REF: number readonly ARRAYBUFFER: number readonly SHAREDARRAYBUFFER: number readonly TYPEDARRAY: number readonly DATAVIEW: number readonly MODULE_NAMESPACE: number readonly BOOLEAN_OBJECT: number readonly NUMBER_OBJECT: number readonly STRING_OBJECT: number readonly SYMBOL_OBJECT: number readonly BIGINT_OBJECT: number readonly ASYNC_FUNCTION: number readonly GENERATOR_FUNCTION: number readonly ASYNC_GENERATOR_FUNCTION: number readonly INT8ARRAY: number readonly UINT8ARRAY: number readonly UINT8CLAMPEDARRAY: number readonly INT16ARRAY: number readonly UINT16ARRAY: number readonly INT32ARRAY: number readonly UINT32ARRAY: number readonly FLOAT16ARRAY: number readonly FLOAT32ARRAY: number readonly FLOAT64ARRAY: number readonly BIGINT64ARRAY: number readonly BIGUINT64ARRAY: number } ``` ## See also [#see-also] * [Bare modules](/bare/reference/bare/modules) — the full `bare-*` catalog. * [Bare runtime API](/bare/reference/bare/runtime) — the runtime these modules extend.