HTML prohibits dragging, selecting, and right-clicking elements, making it impossible for users to drag and right-click images while browsing Web pages to optimize the experience. It can also be used on text labels, so that when the user moves the mouse to text, the mouse does not change to the selected state (that is, the mouse style changes to: I).

In the browser, if there are too many pages, there will be two scroll bars, horizontal and vertical, the default style is ugly, you can adjust it according to the style of the page.