Regex: Select Everything Else

I would like to select everything what's not [a-z0-9 ]

So if the string is:

Hello! How are you Mr. 007?

Then the result wo开发者_运维百科uld be: !,?,.

Use a negated character class:

[^a-z0-9]

You will also need a case-insensitive modifier, or alternatively use this: [^a-zA-Z0-9].

Note that your expected result is incorrect: you missed the space character. If you want to also not match the space character you need to include it in the character class: [^a-zA-Z0-9 ].

With ^ at the beginning of a character class, you negate that class:

str.match(/[^a-z0-9 ]/gi)

You should also add space (or \s (which is space, tab,...)) and the modifier i to make the match case insensitive.

Read more about regular expressions in JavaScript and regular expressions in general.