AngularJS: LimitTo

Parameter order matters in ng-repeat

While building our new timeline app, speed has always been tricky; even if we are trying to show 1k events at once over a span of several years, we hope the app will feel responsive. Accordingly, we’re looping through all available events and reserving a space for them in the DOM whether they are visible or not. This can cause some pretty big slowdowns as our event count grows.

This all happens within an ng-repeat directive that generates an <li> for each event. We already hide the content of the <li> if it’s out of scroll range but to get faster we needed a way to not even render the <li> element itself while a user’s adjusting the range of visible events. limit

To to the rescue. I was able to utilize the limitTo filter and only render enough li’s to fill the screen until the user is done adjusting the range slider. Once they stop adjusting the slider then the limitTo filter changes to show all events. The net effect is when a user is sliding the range slider we limit what we are showing, then when they are done everything shows, speeding up user interaction considerably.

One problem I thought I had was that it wasn’t sorting before we ran the limitTo filter so it would display different results when changing the slider range. That ended up being an easy fix as I just needed to swap the limitTo filter to go last in the ng-repeat directive.

Featured Posts

Follow Along

Stay up to date with the latest news & examples from SeedCode

Leave a Reply

Your email address will not be published. Required fields are marked *

Check out some of our other posts ...

Suggesting Appointment Slots

Show Available Slots that Match Multiple Criteria Schedulers often look for gaps in their schedules to find the open resources for each opportunity. But sometimes,

Introducing Draft Settings Mode

Following up on this idea that people stretch themselves when they feel a little safer, we’ve been very focused on the customization experience for DayBack

New Longer Timescales for DayBack

Resource Scheduling Swimlanes You can now extend the pivoted scheduling view in DayBack to show items by week instead of solely by day. This lets

FileMaker Summer Camp – Recap

Unconference Sessions If you missed Pause in October, here’s a look at the sessions that attendees hosted. All the sessions are listed in this post



Stay up to date with the latest news & examples from SeedCode

© 2024 SeedCode, Inc.