set.prototype.symmetricdifference (npm): An ESnext spec-compliant `Set.prototype.symmetricDifference` shim/polyfill/replacement that works as far down as ES3
Keywords: javascript|ecmascript|polyfill|shim|Set|symmetricDifference|symmetric|difference|Set.prototype.symmetricDifference|es-shims|es-shim API|set|symmetricdifference