Slides and material for a conference talk
There's a myriad of good and bad ways to write our JavaScript-and it keeps evolving! ES2015 is here, ES2016 is coming soon, and the language is changing faster than ever.
Fortunately, there is also a revolution in JavaScript tooling. New tools are here to help us understand and improve our code. Let's look at one of these tools, ESLint, and write our own rules to detect patterns in computer language. While we're at it, let's rediscover how languages are parsed, analyzed, and represented as abstract syntax trees.
The slides have a simple, self-contained example, along with the code snippet for a simple ESLint rule. This repo has a richer example, a clone of TodoMVC in React. It also has the same rule broken out into a plugin, along with tests that you can run to experiment with modifications.
To run the Mocha tests for the ESLint plugin, cd into the code/eslint-plugin-demo directory and run:
npm test
Maintaining JavaScript Code Quality with ESLint - by Jamund Ferguson
Lint Like It's 2015 - by Dan Abramov
Detect Problems in JavaScript Automatically with ESLint - by Jani Hartikainen
Understanding the Real Advantages of Using ESLint - by Evan Schultz
Using eslint alongside the Firefox Hello code base to help productivity - by Standard8
Get Started with ESLint v1.0 - by Ian VanSchooten
Linting JavaScript in 2015 - by Lauritz Hilsøe
ESLint - Pluggable JavaScript linter
Esprima Parser demo and related blog post by Ariya Hidayat
metajs: visualize JavaScript AST execution - for visualizing code stepping
ESLint: Working with Rules - doc for writing rules in ESLint
ESTree Spec - core ESTree AST node types
ESTree ES6 Spec - extensions to the core ESTree AST types to support the ES6 grammar
Gurdas Nijor @ React.js Conf - Unlocking the Structure of Your React Applications with the AST
Mark Knichel @ JSConf EU 2014 - JavaScript Tools at Scale Using Type Information
Dann Toliver @ JSConf US 2015 - Visualizing Process Evolution
JavaScript Jabber 162 - ESLint with Jamund Ferguson
ESLint Gitter Chat - These folks are very helpful
Tweet me @willslab