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rOACCT/node_modules/core-js/modules/esnext.string.is-well-formed.js
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esnext.string.is-well-formed.js
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			'use strict';
			var $ = require('../internals/export');
			var uncurryThis = require('../internals/function-uncurry-this');
			var requireObjectCoercible = require('../internals/require-object-coercible');
			var toString = require('../internals/to-string');

			var charCodeAt = uncurryThis(''.charCodeAt);

			// `String.prototype.isWellFormed` method
			// https://github.com/tc39/proposal-is-usv-string
			$({ target: 'String', proto: true }, {
			isWellFormed: function isWellFormed() {
			var S = toString(requireObjectCoercible(this));
			var length = S.length;
			for (var i = 0; i < length; i++) {
			var charCode = charCodeAt(S, i);
			// single UTF-16 code unit
			if ((charCode & 0xF800) != 0xD800) continue;
			// unpaired surrogate
			if (charCode >= 0xDC00 \|\| ++i >= length \|\| (charCodeAt(S, i) & 0xFC00) != 0xDC00) return false;
			} return true;
			}
			});