Nice 9-minute video from Matt Pocock (from about a year ago) introducing composites. The problem of not being able to compare objects definitely feels worth solving. Or, more accurately, fixing the issue where when compare two objects that look exactly the same, it’s still false. And that using them as keys doesn’t work. Sounds like […]

Frontend Masters is an online learning platform offering  courses on frontend development technologies such as JavaScript, HTML, CSS, React, and Vue.js. Readers can learn about advanced frontend concepts, best practices, and modern development workflows from industry experts. With video lectures, exercises, and real-world projects, Frontend Masters provides  guidance and expertise for mastering frontend development skills.

Frontend Masters

A brief overview of the TC39 Composites proposal for JavaScript, which aims to solve the long-standing problem of value-based object comparison. Unlike plain objects, Composites support structural equality checks via `Composite.equal()` and can be used as Map keys. The proposal is seen as a more viable alternative to the earlier Records & Tuples proposal, which was dropped due to performance concerns. The proposal is still in early discussion stages.

Arrays, objects… now ‘composites’? – Frontend Masters Blog