如果元素旋转，FireFox中的CSS宽度过渡波动

Question

尝试使用旋转的文本设置元素宽度的动画。

动画在Chrome，IE-11，Safari中看起来很流畅但在FireFox中却很不稳定。

如何使垂直div宽度动画更加流畅干净？

段

function animate() {
  var e = document.getElementById('rotbox1');
	if (e.style.width == '120px') e.style.width = '200px'; else e.style.width = '120px';
  e = document.getElementById('rotbox2');
	if (e.style.width == '120px') e.style.width = '200px'; else e.style.width = '120px';
}

animate();

setInterval(animate, 2000);

.wrp-v {
  -webkit-transform: rotate(90deg);
  transform: rotate(90deg);
  -webkit-transform-origin: right;
  transform-origin: right;
  padding-right: 30px;
  position: absolute;
  right: 30%;
  bottom: 20%;
  height: 40px;
}
.wrp-h {
  padding-right: 30px;
  position: absolute;
  right: 30%;
  bottom: 20%;
  height: 40px;
}
.rotbox {
  background: green;
  color: white;
  display: inline-block;
  text-align: center;
  height: 40px;
  width: 200px;
  line-height: 40px;
  border-radius: 20px;
  font-size: 16px;
  -webkit-transition: width 2.0s ease;
  transition: width 2.0s ease;
}

<div class="wrp-v">
  <div class="rotbox" id="rotbox1">Hello world</div>
</div>

<div class="wrp-h">
  <div class="rotbox" id="rotbox2">Hello world</div>
</div>

Answer 1

也许您可以使用writing-mode代替transform：

function animate() {
  var e = document.getElementById('rotbox1');
  if (e.style.height == '120px') e.style.height = '200px';
  else e.style.height = '120px';
  e = document.getElementById('rotbox2');
  if (e.style.width == '120px') e.style.width = '200px';
  else e.style.width = '120px';
}

animate();

setInterval(animate, 2000);

.wrp-v {
  text-align: center;
  -webkit-writing-mode: vertical-lr;
  /* old Win safari */
  writing-mode: vertical-lr;
  writing-mode: tb-lr;
  direction: ltr;
  padding-right: 30px;
  position: absolute;
  right: 30%;
  bottom: 30%;
}
.wrp-h {
  padding-right: 30px;
  position: absolute;
  right: 30%;
  bottom: 20%;
}
.rotbox {
  background: green;
  color: white;
  display: inline-block;
  text-align: center;
  height: 40px;
  line-height: 40px;
  border-radius: 20px;
  font-size: 16px;
  -webkit-transition: width 2.0s ease;
  transition: width 2.0s ease;
}
#rotbox1 {
  height: 200px;
  -webkit-transition: height 2.0s ease;
  transition: height 2.0s ease;
}

<div class="wrp-v">
  <div class="rotbox" id="rotbox1">Hello world</div>
</div>

<div class="wrp-h">
  <div class="rotbox" id="rotbox2">Hello world</div>
</div>

Answer 2

将rotate(90deg);更改为rotate(90.3deg);品牌显得更加顺畅

阅读这个答案： https://stackoverflow.com/a/27898708/3049893

Answer 3

使容器固定宽度似乎解决了问题

function animate() {
  var e = document.getElementById('rotbox1');
	if (e.style.width == '120px') e.style.width = '200px'; else e.style.width = '120px';
  e = document.getElementById('rotbox2');
	if (e.style.width == '120px') e.style.width = '200px'; else e.style.width = '120px';
}

animate();

setInterval(animate, 2000);

.wrp-v {
  -webkit-transform: rotate(90deg);
  transform: rotate(90deg);
  -webkit-transform-origin: right;
  transform-origin: right;
  padding-right: 30px;
  position: absolute;
  right: 30%;
  bottom: 20%;
  height: 40px;
  width: 200px;   /* new */
}

#rotbox1 {   /* new */
    position: absolute;
  right: 0px;
}
.wrp-h {
  padding-right: 30px;
  position: absolute;
  right: 30%;
  bottom: 20%;
  height: 40px;
}
.rotbox {
  background: green;
  color: white;
  display: inline-block;
  text-align: center;
  height: 40px;
  width: 200px;
  line-height: 40px;
  border-radius: 20px;
  font-size: 16px;
  -webkit-transition: width 2.0s ease;
  transition: width 2.0s ease;
}

<div class="wrp-v">
  <div class="rotbox" id="rotbox1">Hello world</div>
</div>

<div class="wrp-h">
  <div class="rotbox" id="rotbox2">Hello world</div>
</div>

Answer 4

将.rotbox设置为position: absolute;可解决此问题。我不知道为什么。 ：）

function animate() {
  var e = document.getElementById('rotbox1');
	if (e.style.width == '120px') e.style.width = '200px'; else e.style.width = '120px';
}

animate();

setInterval(animate, 2000);

.wrp-v {
  -webkit-transform: rotate(90deg);
  transform: rotate(90deg);
  -webkit-transform-origin: right;
  transform-origin: right;
  padding-right: 30px;
  position: absolute;
  right: 30%;
  top: 20%;
  height: 40px;
}

.rotbox {
  position: absolute;
  background: green;
  color: white;
  display: inline-block;
  text-align: center;
  height: 40px;
  width: 200px;
  line-height: 40px;
  border-radius: 20px;
  font-size: 16px;
  -webkit-transition: width 2.0s ease;
  transition: width 2.0s ease;
  
  text-rendering: optimizeLegibility;
}

<div class="wrp-v">
  <div class="rotbox" id="rotbox1">Hello world</div>
</div>