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+<!-- front-matter
+id: api-vinyl
+title: Vinyl
+hide_title: true
+sidebar_label: Vinyl
+-->
+
+# Vinyl
+
+A virtual file format. When a file is read by `src()`, a Vinyl object is generated to represent the file - including the path, contents, and other metadata.
+
+Vinyl objects can have transformations applied using [plugins][using-plugins-docs]. They may also be persisted to the file system using `dest()`.
+
+When creating your own Vinyl objects - instead of generating with `src()` - use the external `vinyl` module, as shown in Usage below.
+
+## Usage
+
+```js
+const Vinyl = require('vinyl');
+
+const file = new Vinyl({
+  cwd: '/',
+  base: '/test/',
+  path: '/test/file.js',
+  contents: new Buffer('var x = 123')
+});
+
+file.relative === 'file.js';
+
+file.dirname === '/test';
+file.dirname = '/specs';
+file.path === '/specs/file.js';
+
+file.basename === 'file.js';
+file.basename = 'file.txt';
+file.path === '/specs/file.txt';
+
+file.stem === 'file';
+file.stem = 'foo';
+file.path === '/specs/foo.txt';
+file.extname === '.txt';
+file.extname = '.js';
+file.path === '/specs/file.js';
+```
+
+## Signature
+
+```js
+new Vinyl([options])
+```
+
+### Parameters
+
+| parameter | type | note |
+|:--------------:|:------:|-------|
+| options | object | Detailed in [Options][options-section] below. |
+
+### Returns
+
+An instance of the Vinyl class representing a single virtual file, detailed in [Vinyl instance][vinyl-instance-section] below.
+
+### Errors
+
+When any passed options don't conform to the [instance property definitions][instance-properties-section] (like if `path` is set to a number) throws as defined in the table.
+
+### Options
+
+| name | type | default | note |
+|:-------:|:------:|-----------|--------|
+| cwd | string | `process.cwd()` | The directory from which relative paths will be derived. Will be [normalized][normalization-and-concatenation-section] and have trailing separators removed. |
+| base | string | | Used to calculate the `relative` instance property. Falls back to the value of `cwd` if not set. Typically set to the [glob base][glob-base-concepts]. Will be [normalized][normalization-and-concatenation-section] and have trailing separators removed.|
+| path | string | | The full, absolute file path. Will be [normalized][normalization-and-concatenation-section] and have trailing separators removed. |
+| history | array | `[ ]` | An array of paths to pre-populate the `history` of a Vinyl instance. Usually comes from deriving a new Vinyl object from a previous Vinyl object. If `path` and `history` are both passed, `path` is appended to `history`. Each item will be [normalized][normalization-and-concatenation-section] and have trailing separators removed. |
+| stat | object | | An instance of `fs.Stats`, usually the result of calling `fs.stat()` on a file. Used to determine if a Vinyl object represents a directory or symbolic link. |
+| contents | ReadableStream <br> Buffer <br> null | null | The contents of the file. If `contents` is a ReadableStream, it is wrapped in a [cloneable-readable][cloneable-readable-external] stream. |
+
+Any other properties on `options` will be directly assigned to the Vinyl instance.
+
+```js
+const Vinyl = require('vinyl');
+
+const file = new Vinyl({ foo: 'bar' });
+file.foo === 'bar';
+```
+
+## Vinyl instance
+
+Each instance of a Vinyl object will have properties and methods to access and/or modify information about the virtual file.
+
+### Instance properties
+
+All internally managed paths - any instance property except `contents` and `stat` - are normalized and have trailing separators removed. See [Normalization and concatenation][normalization-and-concatenation-section] for more information.
+
+| property | type | description | throws |
+|:-----------:|:------:|----------------|----------|
+| contents | ReadableStream <br> Buffer <br> `null` | Gets and sets the contents of the virtual file. If set to a ReadableStream, it is wrapped in a [cloneable-readable][cloneable-readable-docs] stream. | If set to any value other than a ReadableStream, a Buffer, or `null`. |
+| stat | object | Gets and sets an instance of [`fs.Stats`][fs-stats-concepts]. Used when determining if a Vinyl object represents a directory or symbolic link. | |
+| cwd | string | Gets and sets the current working directory. Used for deriving relative paths. | If set to an empty string or any non-string value. |
+| base | string | Gets and sets the base directory. Used to calculate the `relative` instance property. On a Vinyl object generated by `src()` will be set to the [glob base][glob-base-concepts]. If set to `null` or `undefined`, falls back to the value of the `cwd` instance property. | If set to an empty string or any non-string value (except `null` or `undefined`). |
+| path | string | Gets and sets the full, absolute file path. Setting to a value different from the current `path` appends the new path to the `history` instance property. | If set to any non-string value. |
+| history | array | Array of all `path` values the Vinyl object has been assigned. The first element (`history[0]`) is the original path and the last element (`history[file.history.length - 1]`) is the current path. This property and its elements should be treated as read-only and only altered indirectly by setting the `path` instance property. | |
+| relative | string | Gets the relative path segment between the `base` and the `path` instance properties. | If set to any value. If accessed when `path` is not available. |
+| dirname | string | Gets and sets the directory of the `path` instance property. | If accessed when `path` is not available. |
+| stem | string | Gets and sets the stem (filename without extension) of the `path` instance property. | If accessed when `path` is not available. |
+| extname | string | Gets and sets the extension of the `path` instance property. | If accessed when `path` is not available. |
+| basename | string | Gets and sets the filename (`stem + extname`) of the `path` instance property. | If accessed when `path` is not available. |
+| symlink | string | Gets and sets the reference path of a symbolic link. | If set to any non-string value. |
+
+### Instance methods
+
+| method | return type | returns |
+|:----------:|:--------------:|--------|
+| `isBuffer()` | boolean | If the `contents` instance property is a Buffer, returns true. |
+| `isStream()` | boolean | If the `contents` instance property is a Stream, returns true. |
+| `isNull()` | boolean | If the `contents` instance property is `null`, returns true. |
+| `isDirectory()` | boolean | If the instance represents a directory, returns true. An instance is considered a directory when `isNull()` returns true, the `stat` instance property is an object, and `stat.isDirectory()` returns true. This assumes a Vinyl object was constructed with a valid (or properly mocked) `fs.Stats` object. |
+| `isSymbolic()` | boolean | If the instance represents a symbolic link, returns true. An instance is considered symbolic when `isNull()` returns true, the `stat` instance property is an object, and `stat.isSymbolicLink()` returns true. This assumes a Vinyl object was constructed with a valid (or properly mocked) `fs.Stats` object. |
+| `clone([options])` | object | A new Vinyl object with all properties cloned. By default custom properties are deep cloned. If the `deep` option is false, custom attributes will be shallow cloned. If the `contents` option is false and the `contents` instance property is a Buffer, the Buffer will be reused instead of cloned. |
+| `inspect()` | string | Returns a formatted interpretation of the Vinyl object. Automatically called by Node's console.log. |
+
+## Normalization and concatenation
+
+All path properties are normalized by their setters. Concatenate paths with `/`, instead of using `path.join()`, and normalization will occur properly on all platforms. Never concatenate with `\` - it  is a valid filename character on posix system.
+
+```js
+const file = new File();
+file.path = '/' + 'test' + '/' + 'foo.bar';
+
+console.log(file.path);
+// posix => /test/foo.bar
+// win32 => \\test\\foo.bar
+```
+
+[options-section]: #options
+[vinyl-instance-section]: #vinyl-instance
+[instance-properties-section]: #instance-properties
+[normalization-and-concatenation-section]: #normalization-and-concatenation
+[glob-base-concepts]: concepts.md#glob-base
+[fs-stats-concepts]: concepts.md#file-system-stats
+[using-plugins-docs]: ../getting-started/7-using-plugins.md
+[cloneable-readable-external]: https://github.com/mcollina/cloneable-readable