Untitled

<!DOCTYPE html>
<html>
<head>
<meta name="description" content="ecmascript string type wierdness fun">
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>

<script id="jsbin-javascript">
regExString = /string/gi;

typeName = "TEmailString";

otherTypeName = typeName + "";

console.log(regExString.test(typeName));
console.log(regExString.test(typeName + ""));
console.log(regExString.test(otherTypeName));
console.log("");

console.log(typeName.match(regExString) ? true : false);
console.log((typeName + "").match(regExString) ? true : false);
console.log(otherTypeName.match(regExString) ? true : false);
console.log("");

console.log(typeof typeName);
console.log(typeof (typeName + ""));
console.log(typeof otherTypeName);
console.log("");
</script>


<script id="jsbin-source-javascript" type="text/javascript">regExString = /string/gi;

typeName = "TEmailString";

otherTypeName = typeName + "";

console.log(regExString.test(typeName));
console.log(regExString.test(typeName + ""));
console.log(regExString.test(otherTypeName));
console.log("");

console.log(typeName.match(regExString) ? true : false);
console.log((typeName + "").match(regExString) ? true : false);
console.log(otherTypeName.match(regExString) ? true : false);
console.log("");

console.log(typeof typeName);
console.log(typeof (typeName + ""));
console.log(typeof otherTypeName);
console.log("");  </script></body>
</html>