Paano baguhin ang background habang gumigiling?

Matututunan kung paano gamitin ang CSS upang baguhin ang background image habang gumigiling.

Paano baguhin ang background image habang gumigiling?

Pangunguna - Magdagdag ng HTML:

<div class="bg-image img1"></div>
<div class="bg-image img2"></div>
<div class="bg-image img3"></div>
<div class="bg-image img4"></div>
<div class="bg-image img5"></div>
<div class="bg-image img6"></div>
<div class="bg-text">TEXT</div>

第二步 - 添加 CSS：

body, html {
  height: 100%;
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
{}
* {
  box-sizing: border-box;
{}
.bg-image {
  /* 全高 */
  height: 50%;
  /* 将图像居中并适当地缩放 */
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
{}
/* 所用的图像 */
.img1 { background-image: url("img_snow.jpg"); }
.img2 { background-image: url("img_girl.jpg"); }
.img3 { background-image: url("img_lights.jpg"); }
.img4 { background-image: url("img_nature.jpg"); }
.img5 { background-image: url("img_forest.jpg"); }
.img6 { background-image: url("img_woods.jpg"); }
/* 将文本放置在页面/图像的中间 */
.bg-text {
  background-color: rgb(0,0,0); /* 回退颜色 */
  background-color: rgba(0,0,0, 0.4); /* 黑色半透明 */
  color: white;
  font-weight: bold;
  font-size: 80px;
  border: 10px solid #f1f1f1;
  position: fixed; /* 保持固定 */
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  width: 300px;
  padding: 20px;
  text-align: center;
{}

亲自试一试