Javascript regex lookahead syntax

Question

I have the following regex which I'm applying to multiple url's on my page.

(/Services\/(.*?)\/People\/(.*?(?=(\.aspx)))/gi)

What I was trying to do was to match and then replace a url structure that looks like the following example:

/Services/FoodService/People/JoeBloggs.aspx

I have the regex working until the lookahead for the .aspx. So any help in spotting what the error with my lookahead is would be much appreciated!

var res = str.match(/Services\/(.*?)\/People\/(.*?(?=(\.aspx)))/gi);

I've broken down the bit I'm having problems with below:

(.*? (?=(\.aspx)))

Any character:

.*?

As long as the lookahead finds an instance of

.aspx

I've checked out these posts as well, but I'm still struggling so all help appreciated!

anubhava · Accepted Answer · 2014-11-21 12:35:05Z

1

You can use this regex:

\/Services\/(.*?)\/People\/(.*?(?=\.aspx))

answered Nov 21, 2014 at 12:35

anubhava

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1 Comment

Glad it helped. If you don't want to capture JoeBloggs then you can also use: \/Services\/(.*?)\/People\/(?=.*?\.aspx)) regex.