This method causes a string to be displayed as a superscript, as if it were in a <sup> tag.
Its syntax is as follows −
string.sup( )
Returns the string with <sup> tag.
Try the following example.
<html> <head> <title>JavaScript String sup() Method</title> </head> <body> <script type="text/javascript"> var str = new String("Hello world"); alert(str.sup()); </script> </body> </html>
<sup>Hello world</sup>