regex - JQUERY - remove all words after character -

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I need to delete and modify user names

Example: 

  1) max@custom.com 2) zulu-brain@some.com 3) top.master@other.com

The result should be: 

  1) Max 2) ZuluBrain 3) Topmaster

I have to clean the character and special characters after all ".", "-", "# "

What is the best way?

A steady example: 

  var username = "max@custom.com"; Username.replace (/ [^ a-zA-Z 0- 9] + / g, '');

The name should be cleaned but how can I remove everyone after "@"?

An example 

  var user name = "Zulu -Big "can use something. Com ".split ('@') [0] .replace (/ [^ a-zA-Z 0-9] + / g, '');


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