This list of web sites, classes, and books is not meant to be comprehensive, but they are all resources that people in the new developer group have actually used:

General:

• Evergreen Developer Overview
• Code Formatting Standards

Accessibility

• WebAim has a trove of excellent articles
• The a11y weekly newsletter
• axe, a browser extension that catches some accessibility issues. Once it finds an error, it gives you a "Learn More" link that is super helpful at explaining best practices.

Action Triggers

• If This Then That: Action Triggers - Overview of how action triggers are configured and used, and the related code and database components that make them run

Angular

• Build Your First Angular App (online course - https://scrimba.com/g/gyourfirstangularapp)
• Angular 8 - The Complete guide ($ - online course - https://www.udemy.com/the-complete-guide-to-angular-2 - Note: You'll definitely want to learn TypeScript before taking this class. The instructor goes very quickly, so you may want to take a less intensive class first.)
• Evergreen Angular Development Best Practices
• Example of developing a new page for the Evergreen web client
• Angular Client Ingredients (Recording) (Bill Erickson)

Creating and Testing Patches

• Evergreen ILS YouTube Playlist

Evergreen Conference Presentations

• 2018: How Angular Lost its JS (Slides) (Bill Erickson)
• 2019: Writing Angular for Evergreen (PDF) (Galen Charlton)
• 2020: Angular Client Ingredients (Recording) (Bill Erickson)
• 2020: Making PERL work for you in Evergreen (Recording) (Galen Charlton and Mike Rylander)
• 2020: Working with MARC Records in PERL (Recording) (Rogan Hamby)

Git

• Git Complete: The definitive, step-by-step guide to Git ($ - online course - https://www.udemy.com/course/git-complete/)
• Git with Evergreen (Documentation - https://wiki.evergreen-ils.org/doku.php?id=dev:git)

Hacking Evergreen Videos

• Part 1 - https://vimeo.com/230985351
• Part 2 - https://vimeo.com/231611654
• Part 3 - https://vimeo.com/236490496

HTML & CSS

• CSS: Cascading Style Sheets (https://developer.mozilla.org/en-US/docs/Web/CSS)
• Introduction to HTML (https://www.w3schools.com/html/html_intro.asp)
• Web Accessibility Initiative - WAI-ARIA Overview (https://www.w3.org/WAI/standards-guidelines/aria/)

JavaScript

• JavaScript Promises ES6 Training Tutorial (online course - https://www.reddit.com/r/learnjavascript/comments/bu48a5/javascript_promises_es6_training_tutorial_under_6/)

Perl & Perl Template Toolkit

• Template Toolkit (http://www.template-toolkit.org/)
• Making PERL work for you in Evergreen (Recording) (Galen Charlton and Mike Rylander)
• Working with MARC Records in PERL (Recording) (Rogan Hamby)
• Methods in open-ils.cstore

TypeScript

• Introduction to TypeScript Development ($ - online course - https://www.udemy.com/introduction-typescript-development/)
• TypeScript Essential Training ($ - online course - https://www.lynda.com/Typescript-tutorials/TypeScript-Essential-Training/421807-2.html)