Regular Expressions 101

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/
[^\w][\w@\w]+
/
mg
Match a single character not present in the list below
[^\w]
\w matches any word character (equivalent to [a-zA-Z0-9_])
Match a single character present in the list below
[\w@\w]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
\w matches any word character (equivalent to [a-zA-Z0-9_])
@ matches the character @ with index 6410 (4016 or 1008) literally (case sensitive)
\w matches any word character (equivalent to [a-zA-Z0-9_])
Global pattern flags
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.

Regular Expression
No Match

/
/
mg

Test String

Code Generator

Generated Code

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Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report.
For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions