You can also view official election results at electionresults.govt.nz, but you'll need to keep refreshing the page for these to show. Election results on this website are provided by the Electoral Commission through their official feed, and may be subject to a slight delay; but you won't need to keep refreshing this page to update results.
The Electoral Commission's targets for the release of preliminary results are:
If this message appears after 7pm on election night, simply refresh the page. A known bug on this site is that sometimes your browser won't establish an HTTPS connection on the first page load, which stops the site from working. Refreshing solves this.