为什么 arrowBackground 会立即转换并且不需要 0.5 秒

Question

//* Define variables and html elements

const sidebar = document.querySelector('.sidebar');
const arrow = document.querySelector('.arrow');

//* Add event listeners

sidebar.addEventListener('mouseout', () => {
  arrow.style.transitionDelay = '0s';
  sidebar.style.transitionDelay = '0.05s';
})

sidebar.addEventListener('mouseover', () => {
  arrow.style.transitionDelay = '0.05s';
  sidebar.style.transitionDelay = '0s';
})

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  width: 100vw;
  display: flex;
}

.sidebar {
  position: fixed;
  height: 100vh;
  background-color: black;
  width: 80px;
  transition: all 0.5s ease;
  z-index: 0;
}

.arrow {
  position: relative;
  left: 7.5px;
  right: 7.5px;
  top: 7.5px;
  width: 65px;
  height: 65px;
  fill: rgb(115, 151, 162);
  transition: all 0.5s ease;
  z-index: 2;
}

.arrowBackground {
  position: absolute;
  top: 0;
  width: 82px;
  height: 80px;
  background-color: rgb(30, 30, 30);
  z-index: 1;
  border: 2px solid rgb(50, 50, 50);
  transition: all 0.5s ease;
}

.sidebar:hover {
  width: 240px;
}

body:has(.sidebar:hover) .arrow {
  transform: rotate(180deg);
  left: 167.5px;
}

body:has(.sidebar:hover) .arrowBackground {
  left: 160px;
}

<section class="sidebar">
  <div class="icons">
    <div>
      <svg class="icon arrow" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M9.4 233.4c-12.5 12.5-12.5 32.8 0 45.3l160 160c12.5 12.5 32.8 12.5 45.3 0s12.5-32.8 0-45.3L109.2 288 416 288c17.7 0 32-14.3 32-32s-14.3-32-32-32l-306.7 0L214.6 118.6c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0l-160 160z"/></svg>
      <div class="arrowBackground"></div>
    </div>
  </div>
</section>

当我将鼠标悬停在侧栏上时，箭头和侧栏需要 0.5 秒才能转换，但箭头背景类会立即执行此操作，我不知道为什么，我希望它需要 0.5 秒才能转换，但我不知道如何会修复它

我尝试重新排列一些代码，但没有任何效果，我尝试在 JavaScript 中设置转换延迟，但仍然不起作用

Answer 1

将 left: 0; 添加到 arrowBackground，否则它不知道从什么位置转换

//* Define variables and html elements

const sidebar = document.querySelector('.sidebar');
const arrow = document.querySelector('.arrow');

//* Add event listeners

sidebar.addEventListener('mouseout', () => {
  arrow.style.transitionDelay = '0s';
  sidebar.style.transitionDelay = '0.05s';
})

sidebar.addEventListener('mouseover', () => {
  arrow.style.transitionDelay = '0.05s';
  sidebar.style.transitionDelay = '0s';
})

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  width: 100vw;
  display: flex;
}

.sidebar {
  position: fixed;
  height: 100vh;
  background-color: black;
  width: 80px;
  transition: all 0.5s ease;
  z-index: 0;
}

.arrow {
  position: relative;
  left: 7.5px;
  right: 7.5px;
  top: 7.5px;
  width: 65px;
  height: 65px;
  fill: rgb(115, 151, 162);
  transition: all 0.5s ease;
  z-index: 2;
}

.arrowBackground {
  position: absolute;
  left: 0;
  top: 0;
  width: 82px;
  height: 80px;
  background-color: rgb(30, 30, 30);
  z-index: 1;
  border: 2px solid rgb(50, 50, 50);
  transition: all 0.5s ease;
}

.sidebar:hover {
  width: 240px;
}

body:has(.sidebar:hover) .arrow {
  transform: rotate(180deg);
  left: 167.5px;
}

body:has(.sidebar:hover) .arrowBackground {
  left: 160px;
}