JavaScript中的正则表达式，字符存在两种类型

Question

Here is a regular expression in JavaScript to check for the existence of characters from A to Z both lower and uppercase and 0 to 9 in a string.

var validChars = /[0-9a-zA-Z]/;

In addition to these characters I wanted to check for the existence of the "@" sign and the forward slash "/" in the same string.

For example, it will check for the existence of characters 0 to 9 and A to Z and @ and / in a string.

How can this be done?

Answer 1

Try this regex:

[a-zA-Z0-9@\/]*

Explanation

a-zA-Z: lower or upper case characters
0-9: numbers from 0 to 9
@: @
\/: /
*: zero or more machting. You can replace it with `+` for: one or more matching

Live demo

Answer 2

You can simply add those characters to your class.

/^[a-z0-9@\/]+$/i

Note : You should probably use beginning of string ^ and end of string $ anchors here, following your character class with a quantifier and the i modifier can be used for case insensitive matching.