Lightning Web Components Open Source

A few months ago, we introduced Lightning Web Components, a new JavaScript framework that leverages the web standards breakthroughs of the last five years. Today, we are excited to announce the open sourcing of the Lightning Web Components framework, allowing developers to contribute to the roadmap and to use the same framework whether they are building applications on Salesforce or on any other platform. Today, we are excited to announce the open sourcing of the Lightning Web Components framework, allowing developers to contribute to the roadmap, learn the framework at a deeper level by exploring the source code, and use the same JavaScript framework whether they are building on Salesforce or any other platform.

Source: developer.salesforce.com