Angular Series
I have using React in personal and work projects for about two years already. I like it so much that I wanted to change my middle name to React, but then I realized that I do not have a middle name.
Anyways, I recently started on a new project, and they built the frontend using … Angular. Rewriting it from scratch just because the new guy really likes something else is frowned upon by people who like delivering software to customers and stuff like that, so I found myself with no other option than finally digging into it.
I am grossly unqualified to give opinions about Angular, but that won’t stop me from doing it anyways. I want to write about my impressions thus far, comparing it with what I am used to doing in the React world. Note that I started directly with Angular 4, and I have zero plans to check AngularJS anytime soon, so I might be missing a lot of context about why things are as they are in ng.
I will start with the basics, bootstrapping, defaults and so on.
Bootstrapping
Bootstrapping is kind of a dirty word in the React world. Setting up a new project is, frankly, a pain in the ass. I personally decided at some point that keeping up with Webpack is a full time job, so I have outsourced my configuration to Create React App. Even then, I am still waiting for things like CSS Modules out of the box. Cannot say that this is perfect.
Angular, on the other hand, follows more of a batteries included approach. Once you have the package, you get a very comprehensive initial setup just by running
ng new awesome-app
which installs a bunch of stuff. Let’s have a look at what the awesome-app directory
-rw-r--r-- 1 mfernandez 1.3K Mar 25 22:36 .angular-cli.json
-rw-r--r-- 1 mfernandez 245 Mar 25 22:36 .editorconfig
drwxr-xr-x 12 mfernandez 384 Mar 25 22:39 .git
-rw-r--r-- 1 mfernandez 544 Mar 25 22:36 .gitignore
-rw-r--r-- 1 mfernandez 1.1K Mar 25 22:36 README.md
drwxr-xr-x 5 mfernandez 160 Mar 25 22:36 e2e
-rw-r--r-- 1 mfernandez 923 Mar 25 22:36 karma.conf.js
drwxr-xr-x 894 mfernandez 28K Mar 25 22:37 node_modules
-rw-r--r-- 1 mfernandez 415K Mar 25 22:37 package-lock.json
-rw-r--r-- 1 mfernandez 1.3K Mar 25 22:36 package.json
-rw-r--r-- 1 mfernandez 722 Mar 25 22:36 protractor.conf.js
drwxr-xr-x 14 mfernandez 448 Mar 25 22:36 src
-rw-r--r-- 1 mfernandez 363 Mar 25 22:36 tsconfig.json
-rw-r--r-- 1 mfernandez 3.0K Mar 25 22:36 tslint.json
A lot of goodies straight from the beginning! I love free stuff. You have tslint configured, karma for the unit tests, and even end-to-end tests with protractor. Pretty impressive. I wish it was as easy to get started in React.
It is very opinionated, though. It seems there is a strong consensus in the community regarding the tools to use. npm is favored over yarn, TypeScript over JavaScript, and so on.
TypeScript
I remember back in my old company there were some internal discussions regarding typing in JS. One camp favored TypeScript, the other JavaScript and Flow. I ended up going with flow, but I always had the feeling that it was not catching a lot of errors, and that I was spending a lot of time making it sort of work, like with flow-typed. I haven’t yet fully understood the whole type system that TypeScript provides, yet you can see that there is one important difference with flow. It is much more integrated with the core language itself, which makes it a lot more reliable in my impression.
TypeScript is refreshing in a sense because things seem to work more naturally. The tooling seems to be very mature as well, from what I have seen from other people using Visual Studio Code or IntelliJ (not that I would know anything about that, I remain loyal to Emacs). In any case, I have found it pretty enjoyable thus far to work with.
In a sense, it feels like it is bringing JavaScript closer to Java. This might sound like treason, but it can allow you to build more resilient software. Things like interfaces or private modifiers for class members help to avoid surprises and to build more isolated components. For projects with multiple developers working on the same codebase I can see this leading to a better overall architecture.
TypeScript is being driven pretty heavily by Microsoft. They are actively developing features themselves, but also porting the proposals that come into EcmasScript. I was a bit confused in the beginning about that, but you only have to remember that only stage 3 proposals or above seem to be supported. I found this site that allows you to check exactly which features are supported.
Linting
I am a big fan of linting, and ng delivers by including a config for tslint out of the box. You just run ng lint and you get instant feedback.
Lately, however, I have been thinking about the role of a linter in general. After seeing how well gofmt works, I am starting to think that a linter should not be concerned with the formatting of the code, just avoiding bad practices or possible bugs. In the case of JavaScript, I have experimented a bit with prettier to automatically format my code, although I have only used it thus far in personal projects. That is something I want to check in more detail in the future.
Next
First impression was good, but other things have not worked that well. The next part will be about testing.
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