16 lines
375 B
Markdown
16 lines
375 B
Markdown
### isAbsoluteURL
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Returns `true` if the given string is an absolute URL, `false` otherwise.
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Use a regular expression to test if the string is an absolute URL.
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```js
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const isAbsoluteURL = str => /^[a-z][a-z0-9+.-]*:/.test(str);
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```
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```js
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isAbsoluteURL('https://google.com'); // true
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isAbsoluteURL('ftp://www.myserver.net'); // true
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isAbsoluteURL('/foo/bar'); // false
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```
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