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7.1. An Example

Here is an example. It is a regular expression that matches URLs. The pages of this book are not infinitely wide, so I broke it into two lines. In a JavaScript program, the regular expression must be on a single line. Whitespace is significant:

var parse_url = /^(?:([A-Za-z]+):)?(\/{0,3})([0-9.\-A-Za-z]+)
(?::(\d+))?(?:\/([^?#]*))?(?:\?([^#]*))?(?:#(.*))?$/;

var url = "http://www.ora.com:80/goodparts?q#fragment";


  

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