make better widgets

hi.
i have heard that javascript makes website and application seems better but
i don't know how use javascript in QT and what library should i include.
i know that you can use javascript in Qml.

can someone help me?

thanks.

In Qt you can use Javascript in 2 ways:

1. Use Javascript in QML objects
2. Use Javascript with Qt using QtScript

For QML see here.
For QtScript start here