How To Only Allow Alpha Numeric Chars With JavaScript

Question

Been playing around with JavaScript, and what Im trying to do is only allow certain characters in the pass word field - a-z, A-Z and 0-9.

Answer 1

if (name.match(/[\W_]/)) { //...

Meaning if the "name" string has any character which is a non-alphanumeric or an underscore then execute the block. Note that we have to separately check for underscore (_) because the alphanumeric character class (\w) includes the underscore (so the negative class (\W) does not).