97 lines
2.1 KiB
Markdown
97 lines
2.1 KiB
Markdown
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@license Apache-2.0
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Copyright (c) 2018 The Stdlib Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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# UTF-16 Unpaired Surrogate
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> [Regular expression][mdn-regexp] to match an unpaired [UTF-16][utf-16] surrogate.
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<section class="usage">
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## Usage
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<!-- eslint-disable id-length -->
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```javascript
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var reUtf16UnpairedSurrogate = require( '@stdlib/regexp/utf16-unpaired-surrogate' );
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```
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#### reUtf16UnpairedSurrogate()
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Returns a [regular expression][mdn-regexp] to match an unpaired [UTF-16][utf-16] surrogate.
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<!-- eslint-disable id-length -->
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```javascript
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var RE_UTF16_UNPAIRED_SURROGATE = reUtf16UnpairedSurrogate();
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var bool = RE_UTF16_UNPAIRED_SURROGATE.test( 'abc\uD800def' );
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// returns true
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```
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#### reUtf16UnpairedSurrogate.REGEXP
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[Regular expression][mdn-regexp] to match an unpaired [UTF-16][utf-16] surrogate.
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```javascript
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var bool = reUtf16UnpairedSurrogate.REGEXP.test( 'abc\uD800def' );
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// returns true
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```
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</section>
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<!-- /.usage -->
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<section class="examples">
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## Examples
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<!-- eslint-disable id-length -->
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<!-- eslint no-undef: "error" -->
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```javascript
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var reUtf16UnpairedSurrogate = require( '@stdlib/regexp/utf16-unpaired-surrogate' );
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var RE_UTF16_UNPAIRED_SURROGATE = reUtf16UnpairedSurrogate();
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var bool = RE_UTF16_UNPAIRED_SURROGATE.test( '\uD800' );
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// returns true
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bool = RE_UTF16_UNPAIRED_SURROGATE.test( '\uDC00' );
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// returns true
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bool = RE_UTF16_UNPAIRED_SURROGATE.test( 'abc' );
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// returns false
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```
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</section>
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<!-- /.examples -->
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<section class="links">
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[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
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[utf-16]: https://en.wikipedia.org/wiki/UTF-16
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</section>
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<!-- /.links -->
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