将包含emoji图文字符串转换为数组

<html>
<header>
    <title>测试emoji字符长度</title>
</header>
<body>
    <script type="text/javascript">
        let rsAstralRange = '\\ud800-\\udfff',
            rsZWJ = '\\u200d',
            rsVarRange = '\\ufe0e\\ufe0f',
            rsComboMarksRange = '\\u0300-\\u036f',
            reComboHalfMarksRange = '\\ufe20-\\ufe2f',
            rsComboSymbolsRange = '\\u20d0-\\u20ff',
            rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange;
        let reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');

        let rsFitz = '\\ud83c[\\udffb-\\udfff]',
            rsOptVar = '[' + rsVarRange + ']?',
            rsCombo = '[' + rsComboRange + ']',
            rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
            reOptMod = rsModifier + '?',
            rsAstral = '[' + rsAstralRange + ']',
            rsNonAstral = '[^' + rsAstralRange + ']',
            rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
            rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
            rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
            rsSeq = rsOptVar + reOptMod + rsOptJoin,
            rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
        let reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');

        function toArray(val) { // 字符串转成数组
            return hasUnicode(val)
                ? unicodeToArray(val)
                : asciiToArray(val);
        }

        function hasUnicode(val) {
            return reHasUnicode.test(val);
        }

        function unicodeToArray(val) {
            return val.match(reUnicode) || [];
        }

        function asciiToArray(val) {
            return val.split('');
        }

        var str = "zhang‍❤️‍‍12366";
        var arr = toArray(str);
        for (var i in arr) {
            console.log(arr[i]);
            document.write(arr[i]);
            document.write("<br/>");
        }
    </script>
</body>
</html>

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原文地址：https://www.cnblogs.com/yiyanwei/p/15881995.html