betterer VS ESLint

We first took a shot at addressing this gradually using a tool called Betterer, which works by taking a snapshot of the state of a set of errors, warnings, or undesired regular expressions in the codebase and surfacing changes in pull request diffs. Betterer had served us well in the past, such as when it helped us deprecate the Enzyme testing framework in favor of React testing library. However, because there were so many instances of noImplicitAny errors in the codebase, we found that much like snapshot tests, reviewers had begun to ignore Betterer results and we weren’t in fact getting better at all. Begrudgingly, we removed the rule from our Betterer tests and agreed to find a different way to enforce it. Luckily, this decision took place just in time for Snoosweek (Reddit’s internal hack week) so I was able to invest a few days into adding a new automation step to ensure incremental progress toward adherence to this rule.

Check out the beast of a PR here (and yes, it took me three branches to get it right 😅)

I just released v4.0.0 of Betterer 🎉 (now with sweet new docs!) and it has a bunch of simplified APIs for writing tests. And just before I shipped it, I got an issue asking how to write a Stylelint test, so let's do it here and explain it line by line:

You may think that is a bad idea, and stops innovation and adopting new trends and technologies. I dare to disagree. New conventions can be agreed on, and when a new convention is agreed on, it should be used in the codebase from that day on. Either by refactoring the whole code base to follow the new convention, which should be doable if the previous convention was followed carefully, or by using tools such as phenomnomnominal/betterer to incrementally adopt a new convention, and stop anyone from adding new code that does not follow the newly agreed convention. It is equally important to document the agreed conventions and keep the documentation up-to-date over time in addition to making sure everyone on the team hears about and understands the agreed conventions.

I have a tool that I've been working on for a while, and debugging it can be kind of a pain - especially when it's running inside VS Code. It'd be nice to have an easy way to get information about what is going on when the tool runs, without having to manually write a bunch of debug logging code and release a new version. That means that the usual approaches are not going to work:

Let's be honest - setting up tools for a new project can be a frustrating process. Especially when you want to jump straight to coding part. This is often the case with ESLint and Prettier, two popular tools in the JavaScript ecosystem that can sometimes interfere with each other when it comes to code formatting. Fortunately, there's a simple solution to this process, and it's called eslint-plugin-prettier.

Do you have the need to find and fix problems in your JavaScript? Then ESLint is for you. With over 120 million downloads each month, it's definitely one of the most popular projects out there. The latest version introduces a new configuration system, designed to simplify available configuration options. Old and deprecated rules have been removed, and a new configuration inspector has been added. Check out the blog for all the highlights, and a migration guide.

ESLint: A pluggable and configurable linter tool for identifying and reporting on patterns in JavaScript.

Automating code checks with static code analysis allows us to enforce code styling effectively. By integrating tools into our workflow, we can identify errors at an early stage, while coding instead of blocking us at the end. For instance, flake8 checks Python code for style and errors, eslint performs similar checks for JavaScript, and prettier automatically formats code to maintain consistency.

If you're a developer, you're surely familiar with Prettier and ESLint. With over 8 years of existence, they have established themselves as references in the JavaScript ecosystem.

eslint is used to avoid code errors

No lint errors: The committed code does not contain any lint errors (eslint).

Let’s walk through the steps for a one-time setup to configure husky pre-commit and pre-push hooks, ESLint with code styles conventions, prettier code formatter, and lint-staged. Husky automatically runs a script on each commit or push. This is useful for linting files to enforce code styles that keeps the entire code base following conventions.

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ESLint: A pluggable and configurable linter tool for identifying and reporting on patterns in JavaScript.