There's a related proposal for Compartments and Module constructor is a prerequisite to that. A shim for the entire thing exists, with lockdown and Compartments

There's a related proposal for Compartments and Module constructor is a prerequisite to that. A shim for the entire thing exists, with lockdown and Compartments isolating code: https://github.com/endojs/endo/tree/master/packages/ses https://github.com/endojs/endo/tree/master/packages/ses https://github.com/tc39/proposal-compartments/ https://github.com/tc39/proposal-compartments/ It has usage already, eg. metamask snaps