May 2019
Beginner to intermediate
650 pages
14h 50m
English
Content preview from Learn D3.js
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Removing extra elements
It's almost done, but we still have one problem. The extra elements don't go away. Try clicking on Earth or Mars, or look at the following screenshot to see what happens! We have to deal with the exit selection:
Extra elements not removed (Mars's moons were updated, but Neptune's moons still appear).
Code: StepByStep/12-enter-append-merge.html
The exit selection contains elements every time you change to a view that displays fewer moons than the previous ones (the size of the selection is larger than the dataset). These elements need to be removed. All you have to do is to add the following code to the draw() function: ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.