我有一个网站，我希望某个元素在被点击后能够绕360度旋转一次。我听说过旋转div元素的唯一方法是CSS transform属性。我尝试了一些不同的操作，例如
backward.classList.add("notrans");
backward.style.transform = "rotateZ(0deg)";
backward.classList.remove("notrans");
backward.style.transform = "rotateZ(-360deg)";
notrans类使元素的转换时间为0秒，并且
backward.style.transition = "0s";
backward.style.transform = "rotateZ(0deg)";
backward.style.transition = transtime;
backward.style.transform = "rotateZ(360deg)";
这里是我现在正在使用的源代码：
var backward = document.getElementById("backward");
var Backward = function() {bgm.currentTime -= 10;
backward.classList.add("notrans");
backward.style.transform = "rotateZ(0deg)";
backward.classList.remove("notrans");
backward.style.transform = "rotateZ(-360deg)";
}:root {
--color: black;
--hovercolor: white;
--backcolor: white;
--hoverbackcolor: black;
--transtime: 0.5s;
}
#controls {
position: absolute;
left: 0;
top: 45%;
width: 100%;
height: 30%;
font-size: 250%;
border: 1px solid var(--color);
border-radius: 20px;
overflow: hidden;
padding: 0;
background-color: var(--color);
}
.cp {
height: 25%;
width: 0;
overflow: hidden;
background-color: black;
}
.controls {
position: absolute;
top: 0;
width: 25%;
height: 100%;
border: 1px solid var(--color);
background-color: var(--backcolor);
color: var(--color);
line-height: 75%;
transform: rotateZ(0deg);
border-radius: 0;
transition: color var(--transtime), background-color var(--transtime);
text-align: center;
padding: 5%;
}
.controls:hover {
background-color: var(--hoverbackcolor);
color: var(--hovercolor);
}
#pause {
left: 25%;
line-height: 100%;
}
#backward {
left: 0;
line-height: 100%;
}
#autoskip {
right: 0;
}
#forward {
right: 25%;
line-height: 100%;
}
#autoskip {
line-height: 150%;
}
#skipline {
position: absolute;
left: 0;
top: 47.5%;
background-color: red;
height: 5%;
width: 100%;
transform: rotateZ(-45deg);
transition: var(--transtime);
}<!DOCTYPE html>
<html>
<body>
<div id="controls">
<div id="15" class="cp">
<div id="backward" class="controls"><span class="rot"><span class = "button">↺</span></span>
</div>
</div>
<div id="22" class="cp">
<div id="pause" class="controls"><span class="button">| |</span></span>
</div>
</div>
<div id="33" class="cp">
<div id="forward" class="controls"><span class="rot"><span class = "button">↻</span></span>
</div>
</div>
<div id="44" class="cp">
<div id="autoskip" class="controls"><span class="button">⏩</span>
<div id="skipline"></div>
</div>
</div>
</div>
</body>
</html>如您所见，向后按钮在按下时没有旋转。
有帮助吗？
FYI：代码段中有很多额外的内容，例如CSS变量，但这些是必需的。
您是否想要这种行为？
var spinner = document.querySelector("#spinner");
document.querySelector("button").onclick = function() {
spinner.style.animationName = "example";
setTimeout(function() {
spinner.style.animationName = "";
}, 4000);
};#spinner {
width: 100px;
height: 100px;
display: flex;
flex-wrap: wrap;
background-color: red;
border-radius: 50%;
overflow: hidden;
animation-duration: 4s;
animation-iteration-count: infinite;
position: relative;
justify-content: center;
align-items: center;
}
#spinner div {
width: 50%;
height: 50%;
}
#spinner button {
position: absolute;
cursor: pointer;
}
.blue {
background-color: blue;
}
.green {
background-color: green;
}
.red {
background-color: red;
}
.yellow {
background-color: yellow;
}
@keyframes example {
0% {transform: rotate(0deg)}
100% {transform: rotate(360deg)}
}<div id="spinner">
<div class="blue"></div>
<div class="red"></div>
<div class="green"></div>
<div class="yellow"></div>
<button>Spin</button>
</div>