css:
* {
margin:0;
padding:0;
}
#header {
width:100%;
height:50px;
background-color:cadetblue;
text-align:center;
color:white;
position:relative;
overflow:hidden;
transition:all 0.5s;
}
#header>p {
line-height:50px;
}
.close {
position:absolute;
right:5%;
top:0;
padding:10px;
line-height:30px;
cursor:pointer;
}
.open {
position:absolute;
right:5%;
padding:10px;
line-height:30px;
background-color:cadetblue;
cursor:pointer;
transition:all 0.5s;
color:white;
}js:
var oDiv = document.getElementById("header");
var oOpen = document.getElementsByClassName("open");
var oDivheight = oDiv.offsetHeight;
var oOpenheight = oOpen[0].offsetHeight;
oOpen[0].style.top = `-${oOpenheight}px`;
function closeTask() {
oDiv.style.height = "0";
oOpen[0].style.top = "0";
}
const openTask = () => {
oDiv.style.height = `${oDivheight}px`;
oOpen[0].style.top = `-${oOpenheight}px`;
}看完上述内容是否对您有帮助呢？如果还想对相关知识有进一步的了解或阅读更多相关文章，请关注创新互联行业资讯频道，感谢您对创新互联网站建设公司，的支持。