html - 网站滚动一定百分比后 float div

Question

我真的不知道从哪里开始搜索。老实说，我什至不知道如何搜索，因为我不知道它是如何调用的。 (也许是提醒？但我得到的只是汽车 retrofit 的东西)

我在附图中寻找什么。当用户滚动网站的一定百分比时，会出现一条消息。当“鼠标悬停”消息时，它会展开。我想做一些像附加的图像一样的事情。

有人知道我在哪里可以搜索到吗？为了什么？

希望有人能帮助我。

问候语康斯坦丁

at the bottom right is the div

mouse over, expands the div

Answer 1

或者你只能使用 css

   

#div1{
height:50px;
overflow:hidden;
}
#div1:hover{
height:300px;

    -moz-transition: .4s all ease-in-out;
    -ms-transition: .4s all ease-in-out;
    -webkit-transition: .4s all ease-in-out;
    -o-transition: .4s all ease-in-out;
}

<div id="div1">
Lorem ipsum dolor sit amet, consectetur adipisici elit, sed eiusmod tempor incidunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquid ex ea commodi consequat. Quis aute iure reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint obcaecat cupiditat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.

Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.
</div>