如何在将鼠标悬停在其他元素上时显示元素

Question

我想在悬停另一个按钮元素时显示一个按钮元素，但我的代码不起作用。

HTML代码

<div class="right-account">
  <button class="btn_login">MY ACCOUNT</button>
    <a href="../products/user_cart.php"><button class="btn_signup">MY CART</button></a><br>
    <button class="pwd_button">Change Password</button>
</div>

CSS代码

.pwd_button{
display: none;
border: 1px solid #13619f;
background: #2371b7;
padding: 5px;
color: white;
font-size: 15px;
}

.btn_login:hover + .pwd_button{
display: block;
}

但是这段代码不起作用。

Answer 1

尝试使用~:

const btn = document.querySelector('.btn_login')
const pwd = document.querySelector('.pwd_button')
btn.addEventListener('mouseover', () => {
  pwd.classList.add('showpwd')
})
pwd.addEventListener('mouseleave', () => {
  pwd.classList.remove('showpwd')
})

.pwd_button{
  display: none;
  border: 1px solid #13619f;
  background: #2371b7;
  padding: 5px;
  color: white;
  font-size: 15px;
}

.btn_login:hover ~ .pwd_button{
  display: block;
}
.showpwd {
  display: block;
}

<div class="right-account">
  <button class="btn_login">MY ACCOUNT</button>
  <a href="../products/user_cart.php">
    <button class="btn_signup">MY CART</button>
  </a>
  <br>
  <button class="pwd_button">Change Password</button>
</div>

Answer 2

问题是 + 组合符选择了直接兄弟，而密码按钮不是直接兄弟。但它是一个兄弟所以你可以通过选择 tilda 来做你想做的事 ~

参见MDN：

General sibling combinator If you want to select siblings of an element even if they are not directly adjacent, then you can use the general sibling combinator (~).

所以使用：

.btn_login:hover ~ .pwd_button{
  display: block;
}

.pwd_button {
  display: none;
  border: 1px solid #13619f;
  background: #2371b7;
  padding: 5px;
  color: white;
  font-size: 15px;
}

.btn_login:hover~.pwd_button {
  display: block;
}

<div class="right-account">
  <button class="btn_login">MY ACCOUNT</button>

  <a href="../products/user_cart.php"><button class="btn_signup">MY CART</button></a><br>

  <button class="pwd_button">Change Password</button>

</div>

Answer 3

或者我们可以用另一种方式来做 :-D :-P =>

.pwd_button{
display: none;
border: 1px solid #13619f;
background: #2371b7;
padding: 5px;
color: white;
font-size: 15px;

}

.btn_login:hover + .pwd_button{
/*display: inline-block;*/
display: block;
}

<div class="right-account">
        <button class="btn_login">MY ACCOUNT</button>
        <button class="pwd_button">Change Password</button>
        <a href="../products/user_cart.php"><button class="btn_signup">MY CART</button></a><br>
</div>

如何在将鼠标悬停在其他元素上时显示元素

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