To make text italic using JavaScript, use the italics() method. This method causes a string to be italic as if it were in an <i> tag.
Example
You can try to run the following code to make a text italic with JavaScript −
<html> <head> <title>JavaScript String italics() Method</title> </head> <body> <script> var str = new String("Demo Text"); document.write(str.italics()); alert(str.italics()); </script> </body> </html>