As confusing as this appears (are they going to handle new ECMAScript specifications? I am so confused), I am glad that they're supporting Moment.js. It has become one of my default libs, like jQuery, when working on a new project.
The JS Foundation is just the rebranded jQuery Foundation. Despite its name the jQuery Foundation already had a much broader scope than just jQuery (e.g. also Dojo).
The JS Foundation is not related to TC39, the organization in charge of new ECMAScript editions. I guess they might sponsor a TC39 member eventually and engage in JS advocacy beyond merely supporting JS open source projects -- similar to what the PSF and its affiliates do for Python.
