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javascriptregexunicodeascii

How can I tell if a string has any non-ASCII characters in it?

I'm looking to detect internationalized domain names and local portions in email addresses, and would like to know if there is a quick and easy way to do this with regex or otherwise in Javascript.

Solution

  • Try with this regex. It tests for all ascii characters that have some meaning in a string, from space 32 to tilde 126:

    var ascii = /^[ -~]+$/;

if ( !ascii.test( str ) ) {
  // string has non-ascii characters
}

    Edit: with tabs and newlines:

    /^[ -~\t\n\r]+$/;