js 正则匹配0-9 a-z A-Z @_.-

Question

js 正则匹配0-9 a-z A-Z @_.-如何写？主要是后面  @_.- 这4个

Answer 1

 /^[\da-z@_\.-]$/i

Answer 2

 /^[\da-zA-Z@_\.\-]$/i