jquery+CSS3 implements drop-down navigation menu function-JS Tutorial-php.cn

jquery+CSS3 implements drop-down navigation menu function

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Release： 2018-04-24 11:28:37

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This time I will bring you jquery CSS3 to implement the drop-down navigation menu function. What are the precautions for jquery CSS3 to implement the drop-down navigation menu function. The following is a practical case, let's take a look.

##The HTML structure of the

drop-down menu is very simple. The basic HTML structure is as follows:

<p id="top-bar" class="top-bar">
 <p class="bar">
  <button id="navbox-trigger" class="navbox-trigger"><i class="fa fa-lg fa-th"></i></button>
 </p>
 <p class="navbox">
  <p class="navbox-tiles">
  <a href="#" class="tile">
   <p class="icon"><i class="fa fa-home"></i></p><span class="title">Home</span>
  </a>
  ......
  </p>
 </p>
</p>

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CSS style

In the CSS style, the top navigation bar .top-bar is set to a fixed height of 50 pixels and relative positioning, and is given a higher z-index value.

.top-bar {
 height: 50px;
 position: relative;
 z-index: 1000;
}

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The drop-down menu.navbox is hidden at first. It uses

absolute positioning and moves it to 200 pixels above the navigation bar through the translateY method.

.top-bar .navbox {
 visibility: hidden;
 opacity: 0;
 position: absolute;
 top: 100%;
 left: 0;
 z-index: 1;
 -webkit-transform: translateY(-200px);
  -ms-transform: translateY(-200px);
   transform: translateY(-200px);
 -webkit-transition: all .2s;
   transition: all .2s;
}

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Then when the drop-down menu is activated, its transparency is set back to 1, becomes visible, and is moved back to its original position through the translateY method.

.top-bar.navbox-open .navbox {
 visibility: visible;
 opacity: 1;
 -webkit-transform: translateY(0);
  -ms-transform: translateY(0);
   transform: translateY(0);
 -webkit-transition: opacity .3s, -webkit-transform .3s;
   transition: opacity .3s, transform .3s;
}

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JavaScript

This special effect uses jQUery to switch the corresponding class class and to open the menu button.

(function () {
 $(document).ready(function () {
 $('#navbox-trigger').click(function () {
  return $('#top-bar').toggleClass('navbox-open');
 });
 return $(document).on('click', function (e) {
  var $target;
  $target = $(e.target);
  if (!$target.closest('.navbox').length && !$target.closest('#navbox-trigger').length) {
  return $('#top-bar').removeClass('navbox-open');
  }
 });
 });
}.call(this));

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!