Apply css to text

I haved looked at some posts about applying css and I came up with the following.

Would this be the right way to apply css to my textbox.

sym.$("headline1Txt").html("<p id='headlineText'></p>");

sym.$("headline1Txt").css(" -webkit-font-smoothing","antialiased","font-family","'Varela Round', Helvetica, sans-serif !important");