23 lines
573 B
Markdown
23 lines
573 B
Markdown
---
|
|
title: String is alphanumeric
|
|
type: snippet
|
|
tags: [string,regexp]
|
|
cover: mountain-lake-cottage-2
|
|
dateModified: 2020-10-20T23:02:01+03:00
|
|
---
|
|
|
|
Checks if a string contains only alphanumeric characters.
|
|
|
|
- Use `RegExp.prototype.test()` to check if the input string matches against the alphanumeric regexp pattern.
|
|
|
|
```js
|
|
const isAlphaNumeric = str => /^[a-z0-9]+$/gi.test(str);
|
|
```
|
|
|
|
```js
|
|
isAlphaNumeric('hello123'); // true
|
|
isAlphaNumeric('123'); // true
|
|
isAlphaNumeric('hello 123'); // false (space character is not alphanumeric)
|
|
isAlphaNumeric('#$hello'); // false
|
|
```
|