62 lines
1.8 KiB
Markdown
62 lines
1.8 KiB
Markdown
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# function-name-support
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Feature detection for function names. See [*The names of functions in
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ES6*](http://2ality.com/2015/09/function-names-es6.html) for background.
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Provides the [same results as
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`node-compat-table`][node-compat-table].
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## Installation
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```console
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$ npm install --save function-name-support
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```
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## Usage
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```js
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const functionNameSupport = require('function-name-support')
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```
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### `support`
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A frozen object with boolean values. Compare with
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[`node-compat-table`][node-compat-table]:
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* *function statements*: `functionStatements`
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* *function expressions*: `functionExpressions`
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* *new Function*: `newFunction`
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* *bound functions*: `boundFunctions`
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* *variables (function)*: `functionVariables`
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* *object methods (function)*: `functionObjectMethods`
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* *accessor properties*: `accessorProperties`
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* *shorthand methods*: `shorthandMethods`
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* *symbol-keyed methods*: `symbolKeyedMethods`
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* *class statements*: `classStatements`
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* *class expressions*: `classExpressions`
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* *variables (class)*: `classVariables`
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* *object methods (class)*: `classObjectMethods`
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* *class prototype methods*: `classPrototypeMethods`
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* *class static methods*: `classStaticMethods`
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### `hasFullSupport`
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A boolean indicating whether all known function name inferences are supported.
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### `bitFlags`
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An integer that stores a serialization of the `support` object. Useful when
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storing a function name (or lack thereof) for later comparisons along with
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details on whether the function name was inferable at all.
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### `isSubsetOf(otherFlags): boolean`
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Helper method for comparing `bitFlags`. Returns `true` if it is a subset of
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`otherFlags`.
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### `isSupersetOf(otherFlags: number): boolean`
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Helper method for comparing `bitFlags`. Returns `true` if it is a superset of
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`otherFlags`.
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[node-compat-table]: http://node.green/#ES2015-built-in-extensions-function--name--property
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