从 JavaScript 中的字符串中删除除 @ 符号之外的所有特殊字符

Question

I have a string :

“Gazelles were mentioned by @JohnSmith while he had $100 in his pocket and screamed W#$@%@$!!!!"

I need:

“Gazelles were mentioned by @JohnSmith while he had 100 in his pocket and screamed"

How to remove all special characters from string EXCEPT the @ symbol. I tried:

str.replace(/[^\w\s]/gi, '')

Answer 1

If you want to keep the @ when it is followed by a word char and keeping the W is also ok and also remove the newlines, you could for example change the \\s to match spaces or tabs [ \\t]

Add the @ to the negated character class and use an alternation specifying to only match the @ when it is not followed by a word character using a negative lookahead.

[^\w \t@]+|@(?!\w)

• [^\\w \\t@]+ Match 1+ times any char except a word char, space or tab
• | Or
• @(?!\\w) Match an @ not directly followed by a word char

Regex demo

In the replacement use an empty string.