set.prototype.issubsetof

An ESnext spec-compliant `Set.prototype.isSubsetOf` shim/polyfill/replacement that works as far down as ES3

v1.1.4 URL: https://unpkg.com/set.prototype.issubsetof@1.1.4/index.js

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javascript ecmascript Set isSubsetOf Set.prototype.isSubsetOf subset polyfill shim es-shim API es-shims