Skip to main content

ReactJS Tip: CSS Transition Groups and Vendor Bundling

Every developer finding their way around ReactJS is going to come across CSS Transition Groups sooner or later. These helpful components built by the ReactJS team but distributed separately help to manage animations related to adding or removing elements from a list. This is important in ReactJS, because the virtual DOM reuses nodes as much as it can, meaning what seems like a new element but really be reusing nodes underneath.
You can read all about the ReactCSSTransitionGroup at the React documentation, but I want to note about one way you might trip integrating it with your project: building vendor bundles for your dependencies.
If you use Browserify to bundle your own code and its dependencies for distribution, you may be using the vendor bundle pattern. This is the practice of separating your distribution into two bundles: one containing your dependencies, including ReactJS itself, and one with your own project code. This is a good pattern because you can rebuild just your project bundle during development, allowing you to iterate much faster without rebuilding a large number of non-changing dependencies.
This tip is about what happens when you move to add ReactCSSTransitionGroup to your project by first installing the package.
npm install --save-dev react-addons-css-transition-group
and import this in the packages where you need to use it.
import ReactCSSTransitionGroup from 'react-addons-css-transition-group';
And now you have fundamentally broken your project. Why? Because the react-addons-css-transition-group module itself depends on react creating a second copy of ReactJS in your application bundle, in addition to the copy already in your vendor bundle. Operations through the CSS Transition Group will fail in strange ways, as happens when you have multiple copies of ReactJS in a single page.
The solution is simply to add this new module to your vendor bundle.
var vendor = browserify({
    debug: false,
    require: ['react', 'react-dom', 'react-addons-css-transition-group'],
});

Comments

Popular posts from this blog

Respect and Code Reviews

Code Reviews in a development team only function best, or possible at all, when everyone approaches them with respect. That’s something I’ve usually taken for granted because I’ve had the opportunity to work with amazing developers who shine not just in their technical skills but in their interpersonal skills on a team. That isn’t always the case, so I’m going to put into words something that often exists just in assumptions.
You have to respect your code. This is first only because the nature and intent of code reviews are to safeguard the quality of your code, so even having code reviews demonstrates a baseline of respect for that code. But, maybe not everyone on the team has the same level of respect or entered a team with existing review traditions that they aren’t acquainted with.
There can be culture shock when you enter a team that’s really heavy on code reviews, but also if you enter a team or interact with a colleague who doesn’t share that level of respect for the process or…

CARDIAC: The Cardboard Computer

I am just so excited about this.


CARDIAC. The Cardboard Computer. How cool is that? This piece of history is amazing and better than that: it is extremely accessible. This fantastic design was built in 1969 by David Hagelbarger at Bell Labs to explain what computers were to those who would otherwise have no exposure to them. Miraculously, the CARDIAC (CARDboard Interactive Aid to Computation) was able to actually function as a slow and rudimentary computer. 
One of the most fascinating aspects of this gem is that at the time of its publication the scope it was able to demonstrate was actually useful in explaining what a computer was. Could you imagine trying to explain computers today with anything close to the CARDIAC?

It had 100 memory locations and only ten instructions. The memory held signed 3-digit numbers (-999 through 999) and instructions could be encoded such that the first digit was the instruction and the second two digits were the address of memory to operate on. The only re…

How To Care If BSD, MIT, or GPL Licenses Are Used

The two recent posts about some individuals' choice of GPL versus others' preference for BSD and MIT style licensing has caused a lot of debate and response. I've seen everything as an interesting combination of very important topics being taken far too seriously and far too personally. All involved need to take a few steps back.

For the uninitiated and as a clarifier for the initiated, we're dealing with (basically) three categories of licensing when someone releases software (and/or its code):
Closed Source. Easiest to explain, because you just get nothing.GPL. If you get the software, you get the source code, you get to change it, and anything you combine it with must be under the same terms.MIT and BSD. If you get the software, you might get the source code, you get to change it, and you have no obligations about anything else you combine it with.The situation gets stickier when we look at those combinations and the transitions between them.

Use GPL code with Closed S…