Yarn is a JavaScript package manager that also gives developers a project management toolset and a zero-install deployment solution. Heroku supports Yarn 2, 3, and 4, so developers are able to take advantage of zero-installs during their Node.js builds. We’ll go over a popular use case for Yarn that was enhanced by Yarn 2 and later releases: using workspaces to manage dependencies for a monolithic repository, also known as a multi-package repository or a monorepo.

Our Yarn Workspaces tutorial will cover Yarn monorepo setup and how to take advantage of Yarn’s cache to manage monorepo dependencies. Prerequisites for this include a development environment with Node installed. To follow...

JavaScript turns 25 years old today. While it’s made an impact on my career as a developer, it has also impacted many developers like me and users around the world. To commemorate our favorite language, we’ve collected 25 landmark events that have shaped the path of what the JavaScript ecosystem looks like today.

1995

1) JavaScript is created

In 1995, Brendan Eich, a developer at Netscape, known for their Netscape browser, was tasked with building a client-side scripting language that paired well with Java. While it may not be the language that you know and love today, JavaScript was written in 10 days with features we still use today, such as first-class functions.

1997

2)...

It’s been a little over a year since our last Happy Node Hackers post, and even in such a short time much has changed and some powerful new tools have been released. The Node.js ecosystem continues to mature and new best practices have emerged.

Here are 8 habits for happy Node hackers updated for 2017. They're specifically for app developers, rather than module authors, since those groups have different goals and constraints:

Choices are an important part of a healthy open source software community. That’s why we’re excited about Yarn, a new package manager that addresses many of the problems with Node’s default package manager, npm. While npm has done a fantastic job creating a large and vibrant JavaScript ecosystem, I want to share why Yarn is an important addition to the Node.js ecosystem, how it will improve your Node.js development experience, and how Heroku has incorporated it into the build process for your Heroku apps.

We began testing Yarn almost immediately after it was released, and began fully supporting it on December 16.

About Yarn

Yarn was released in October 2016 and made a big splash...