Return a regular expression to match an unpaired UTF-16 surrogate.
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> [Regular expression][mdn-regexp] to match an unpaired [UTF-16][utf-16] surrogate.
``bash`
npm install @stdlib/regexp-utf16-unpaired-surrogate
`javascript`
var reUtf16UnpairedSurrogate = require( '@stdlib/regexp-utf16-unpaired-surrogate' );
#### reUtf16UnpairedSurrogate()
Returns a [regular expression][mdn-regexp] to match an unpaired [UTF-16][utf-16] surrogate.
`javascript
var RE_UTF16_UNPAIRED_SURROGATE = reUtf16UnpairedSurrogate();
var bool = RE_UTF16_UNPAIRED_SURROGATE.test( 'abc\uD800def' );
// returns true
`
#### reUtf16UnpairedSurrogate.REGEXP
[Regular expression][mdn-regexp] to match an unpaired [UTF-16][utf-16] surrogate.
`javascript`
var bool = reUtf16UnpairedSurrogate.REGEXP.test( 'abc\uD800def' );
// returns true
`javascript
var reUtf16UnpairedSurrogate = require( '@stdlib/regexp-utf16-unpaired-surrogate' );
var RE_UTF16_UNPAIRED_SURROGATE = reUtf16UnpairedSurrogate();
var bool = RE_UTF16_UNPAIRED_SURROGATE.test( '\uD800' );
// returns true
bool = RE_UTF16_UNPAIRED_SURROGATE.test( '\uDC00' );
// returns true
bool = RE_UTF16_UNPAIRED_SURROGATE.test( 'abc' );
// returns false
`
*
- [@stdlib/regexp-utf16-surrogate-pair][@stdlib/regexp/utf16-surrogate-pair]: return a regular expression to match a UTF-16 surrogate pair.
*
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---
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[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
[utf-16]: https://en.wikipedia.org/wiki/UTF-16
[@stdlib/regexp/utf16-surrogate-pair]: https://www.npmjs.com/package/@stdlib/regexp-utf16-surrogate-pair