Hi, I want to add twitter share button to my website, still I don’t want to use the old classic official share btn, I want something stylish. the problem is, if I create a new one I will lose the functionality that the official one has(such as via @user). so to put it simple, I want to add the via @user to a custom twitter share btn, or to change the official share button’s look.

The Tweet Button generator will help you configure a new Tweet Button, including a large button and a custom @username to pass in as the via parameter.
https://about.twitter.com/resources/buttons#tweet

You may create your own link to share Twitter content, passing your own via query parameter.