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@license Apache-2.0

Copyright (c) 2018 The Stdlib Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# isRelativePath

> Test if a value is a relative path.

<section class="intro">

</section>

<!-- /.intro -->

<section class="usage">

## Usage

```javascript
var isRelativePath = require( '@stdlib/assert/is-relative-path' );
```

#### isRelativePath( value )

Tests if a `value` is a relative path.

```javascript
var IS_WINDOWS = require( '@stdlib/assert/is-windows' );

var bool;
if ( IS_WINDOWS ) {
    bool = isRelativePath( 'foo\\bar\\baz' );
    // returns true

    bool = isRelativePath( 'C:\\foo\\..\\bar\\baz' );
    // returns false
} else {
    bool = isRelativePath( './foo/bar/baz' );
    // returns true

    bool = isRelativePath( '/foo/../bar/baz' );
    // returns false
}
```

#### isRelativePath.posix( value )

Tests if a `value` is a POSIX relative path.

```javascript
var bool = isRelativePath.posix( './foo/bar/baz' );
// returns true

bool = isRelativePath.posix( '/foo/../bar/baz' );
// returns false
```

#### isRelativePath.win32( value )

Tests if a `value` is a Windows relative path.

```javascript
var bool = isRelativePath.win32( 'foo\\bar\\baz' );
// returns true

bool = isRelativePath.win32( 'C:\\foo\\..\\bar\\baz' );
// returns false
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   `isRelativePath()` is platform-specific. On Windows platforms, the function is equal to `isRelativePath.win32()`. On POSIX platforms, the function is equal to `isRelativePath.posix()`.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var isRelativePath = require( '@stdlib/assert/is-relative-path' );

var bool = isRelativePath.posix( 'foo/' );
// returns true

bool = isRelativePath.posix( 'foo' );
// returns true

bool = isRelativePath.posix( '.' );
// returns true

bool = isRelativePath.posix( '' );
// returns true

bool = isRelativePath.posix( '/foo/bar/baz' );
// returns false

bool = isRelativePath.posix( '/foo/..' );
// returns false

bool = isRelativePath.win32( 'foo\\bar\\baz' );
// returns true

bool = isRelativePath.win32( 'foo/bar/baz' );
// returns true

bool = isRelativePath.win32( 'foo/..' );
// returns true

bool = isRelativePath.win32( '.' );
// returns true

bool = isRelativePath.win32( '' );
// returns true

bool = isRelativePath.win32( 'C:\\foo\\bar\\baz' );
// returns false

bool = isRelativePath.win32( '//server' );
// returns false

bool = isRelativePath.win32( '\\\\server' );
// returns false

bool = isRelativePath.win32( 'C:/foo/bar/baz' );
// returns false

bool = isRelativePath.win32( '/foo/..' );
// returns false
```

</section>

<!-- /.examples -->

* * *

<section class="cli">

## CLI

<section class="usage">

### Usage

```text
Usage: is-relative-path [options] [<path>]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.
         --platform name       Platform: 'win32' or 'posix'.
```

</section>

<!-- /.usage -->

<section class="examples">

### Examples

```bash
$ is-relative-path ./foo/bar/baz --platform=posix
true
```

To use as a [standard stream][standard-streams],

```bash
$ echo -n './docs/repl.txt' | is-relative-path
true
```

</section>

<!-- /.examples -->

</section>

<!-- /.cli -->

<section class="links">

[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams

</section>

<!-- /.links -->