javascript - Url parameters extraction -

var results = new regexp('[\\?&]' + name + '=([^&#]*)').exec(window.location.href); 

could u please explain exactlly happening in above line of code.

thanks in advance.

• you create variable name of results scoped execution context.
• you invoke regexp constructor thereby instantiating object , pass string used regex. have way because can't concatenate regex literals outside data.
• the regex says match of \, ? or & followed name variable, , literal = , make capturing group of every character besides & or #, 0 or more times.
• you call exec() method on new regexp object, window.location.href (the current url) argument.
• the return of assigned results variable.
• the capturing group's contents (if successful) in results[1].

or

you getting param name :)