string.prototype.iswellformed

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

v1.0.2 URL: https://unpkg.com/string.prototype.iswellformed@1.0.2/index.js

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javascript ecmascript polyfill shim es-shim API unicode string surrogate pair well-formed String.prototype.isWellFormed