Delay dropdown mouseleft 2 second-CodePudding

Could you please help me? I'm trying to delay 2 seconds my dropdown after user leaving mouse, I tried insert several transition in every CSS selector for many hours but without any success.

/* Navbar container */
.navbar {
  overflow: hidden;
  background-color: #333;
  font-family: Arial;
}

/* Links inside the navbar */
.navbar a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

/* The dropdown container */
.dropdown {
  float: left;
  overflow: hidden;
}

/* Dropdown button */
.dropdown .dropbtn {
  font-size: 16px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font: inherit; /* Important for vertical align on mobile phones */
  margin: 0; /* Important for vertical align on mobile phones */
}

<div >
  <a href="#home">Home</a>
  <a href="#news">News</a>
  <div >
    <button >Dropdown
      <i ></i>
    </button>
    <div >
      <div >
        <h2>Mega Menu</h2>
      </div>
      <div >
        <div >
          <h3>Category 1</h3>
          <a href="#">Link 1</a>
          <a href="#">Link 2</a>
          <a href="#">Link 3</a>
        </div>
        <div >
          <h3>Category 2</h3>
          <a href="#">Link 1</a>
          <a href="#">Link 2</a>
          <a href="#">Link 3</a>
        </div>
        <div >
          <h3>Category 3</h3>
          <a href="#">Link 1</a>
          <a href="#">Link 2</a>
          <a href="#">Link 3</a>
        </div>
      </div>
    </div>
  </div>
</div>

I tried to insert transition-delay: 0s; and transition-duration: 2s; on .navbar a:hover, .dropdown:hover .dropbtn { but didnt work.

I want something like this => http://jsfiddle.net/odsb86o2/1/
Test my code here => https://jsfiddle.net/foks8bt5/

Could you please help me?

CodePudding user response：

TL;DR. `display` cannot be animated. Use `opacity` instead.

As the others mentioned in the comments, you cannot animate between display: none; and display: block;. In this scenario, a typical CSS solution is to use opacity instead.

Please see the slightly tweaked code sample below. The only critical changes are replacing display: none;/display: block; with opacity:0;/opacity:1;.

Note I've also added pointer-events: none; to invisible state and put pointer-events: all; back when it's visible. This is to avoid the invisible mega menu blocking any elements below it while it's inactive.

/* Navbar container */
.navbar {
  overflow: hidden;
  background-color: #333;
  font-family: Arial;
}

/* Links inside the navbar */
.navbar a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

/* The dropdown container */
.dropdown {
  float: left;
  overflow: hidden;
}

/* Dropdown button */
.dropdown .dropbtn {
  font-size: 16px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font: inherit; /* Important for vertical align on mobile phones */
  margin: 0; /* Important for vertical align on mobile phones */
  cursor: pointer;
}

/* Add a red background color to navbar links on hover */
.navbar a:hover, .dropdown:hover .dropbtn {
  background-color: red;
}

/* Dropdown content (hidden by default) */
.dropdown-content {
  opacity: 0;
  pointer-events: none;
  transition: opacity .5s;
  transition-delay: .5s;
  position: absolute;
  background-color: #f9f9f9;
  width: 100%;
  left: 0;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

/* Mega Menu header, if needed */
.dropdown-content .header {
  background: red;
  padding: 16px;
  color: white;
}

/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content {
  opacity: 1;
  pointer-events: all;
}

/* Create three equal columns that floats next to each other */
.column {
  float: left;
  width: 33.33%;
  padding: 10px;
  background-color: #ccc;
  height: 250px;
}

/* Style links inside the columns */
.column a {
  float: none;
  color: black;
  padding: 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

/* Add a background color on hover */
.column a:hover {
  background-color: #ddd;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

<div >
  <a href="#home">Home</a>
  <a href="#news">News</a>
  <div >
    <button >Dropdown
      <i ></i>
    </button>
    <div >
      <div >
        <h2>Mega Menu</h2>
      </div>
      <div >
        <div >
          <h3>Category 1</h3>
          <a href="#">Link 1</a>
          <a href="#">Link 2</a>
          <a href="#">Link 3</a>
        </div>
        <div >
          <h3>Category 2</h3>
          <a href="#">Link 1</a>
          <a href="#">Link 2</a>
          <a href="#">Link 3</a>
        </div>
        <div >
          <h3>Category 3</h3>
          <a href="#">Link 1</a>
          <a href="#">Link 2</a>
          <a href="#">Link 3</a>
        </div>
      </div>
    </div>
  </div>
</div>

TL;DR. display cannot be animated. Use opacity instead.

TL;DR. `display` cannot be animated. Use `opacity` instead.