Quick edit with a dictionary.
function highlight(code) { const colorDict = {'F': 'pink', 'L': 'red', 'R':'green'}; return code.replace(/(\D)\1*|\d+/g, (substr) => { let testChar = substr.charAt(0); if (testChar in colorDict) { return '<span style="color: ' + colorDict[testChar] + '">' + substr + '</span>'; } else if (!isNaN(testChar)) { return '<span style="color: orange">' + substr + '</span>'; } else { return substr; } }) }
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Quick edit with a dictionary.