可移动按钮的名称是什么？

Sometimes when I am using freelance websites, I often come across the section of Choose your skills with the ability to search for skills then clicking on them. Once you click the skills, the skill is added to your "inventory" of skills in an oval button like shape. However, if you added a wrong skill, you can hover over the skill and click on the (x) part of the button to remove it. It is also used in stackoverflow when you want to add the tags to your question. Sometimes when I am using freelance websites, I