<p id="demo"></p>
<script>
var car = "";
document.getElementById("demo").innerHTML
= "The value is: " +
car + "<br />" +
"The type is:" + typeof car;
</script>
</body>
An empty value has nothing to do with undefined. An empty string variable has both a value and a type.
var car = ""; <=== The value is "", the typeof is string
| HTML file: | Displayed by browser: |
|---|---|
|
<body>
<p id="demo"></p> <script> var car = ""; document.getElementById("demo").innerHTML = "The value is: " + car + "<br />" + "The type is:" + typeof car; </script> </body> |
