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