What steps can I take to stop a responsive navigation menu with CSS3 transitions from animating when the media queries change?

Question

What steps can I take to stop a responsive navigation menu with CSS3 transitions from animating when the media queries change?

Welcome Message

I am currently working on developing a website that is responsive and includes a navigation menu that meets the following two key criteria:

The navigation should be clearly visible in a standard browser window, with a horizontal layout.
For mobile devices and smaller screens, the navigation should transform into a collapsible vertical menu with smooth animations between the "open" and "closed" states.

Specifically focusing on ensuring optimal performance on mobile devices, especially iOS, I aim to utilize a GPU-accelerated translate3d transform CSS transition for the animation as suggested by this resource.

Current Challenge

The initial setup of the navigation has been successful and functions well overall. By implementing z-index: 1 and

transform: translate3d(0,-100%,0)

, I was able to hide the menu behind a header featuring z-index: 2 in its closed state. The animation then transitions the menu using transform: translate3d(0,0,0) when opening.

However, there is one issue persisting: Upon resizing the Chrome browser window triggering the mobile media query, the menu animates from open to closed.

To observe the problem firsthand, adjust your browser window width to less than 600px:

Fullscreen jsfiddle example: http://fiddle.jshell.net/ymDYG/1/show/
Original jsfiddle demo: http://jsfiddle.net/ymDYG/1/

The potential reason for this behavior could be attributed to the browser recognizing that .nav is inactive when the mobile media query activates, leading to the unintentional animation. Although I've attempted experimenting with display:none and display:block for different media queries, it appears to disrupt the animation entirely.

How can I prevent the closing animation of the nav menu during browser window resizing?

css css-transitions

Answer 1

Answer №1

Great work, very well-executed. Can I borrow some inspiration? :-)

By the way, here is your solution showcased in a live demo.

I've reorganized the code by creating a separate class for the transition:

.nav {
    /* styles */
    z-index: 1;
    transform: translate3d(0,-100%,0);
    -webkit-transform: translate3d(0,-100%,0);
}
.nav.active {
    transform: translate3d(0,0,0);
    -webkit-transform: translate3d(0,0,0);
}
.nav.activated {
    transition: transform 400ms linear;
    -webkit-transition: -webkit-transform 400ms linear;
}

This new class can be added to the element upon initial "Toggle":

function toggle(){
    $(".nav").addClass("activated").toggleClass("active");
}

P.S. To prevent the transition from occurring if the user opens the menu and then resizes the window, you could utilize Modernizr's mq method:

$(window).on('resize',function(){
    if(Modernizr.mq('(min-width:600px)')) $(".nav").removeClass("activated");
});

Answer 2

Great work, very well-executed. Can I borrow some inspiration? :-)

By the way, here is your solution showcased in a live demo.

I've reorganized the code by creating a separate class for the transition:

.nav {
    /* styles */
    z-index: 1;
    transform: translate3d(0,-100%,0);
    -webkit-transform: translate3d(0,-100%,0);
}
.nav.active {
    transform: translate3d(0,0,0);
    -webkit-transform: translate3d(0,0,0);
}
.nav.activated {
    transition: transform 400ms linear;
    -webkit-transition: -webkit-transform 400ms linear;
}

This new class can be added to the element upon initial "Toggle":

function toggle(){
    $(".nav").addClass("activated").toggleClass("active");
}

P.S. To prevent the transition from occurring if the user opens the menu and then resizes the window, you could utilize Modernizr's mq method:

$(window).on('resize',function(){
    if(Modernizr.mq('(min-width:600px)')) $(".nav").removeClass("activated");
});

Answer 3

Answer №2

Discussing the side effect mentioned by Giona:

P.S. If you're looking to prevent the transition from occurring even after the user has opened the menu and then resized the window (...)

there is an alternative solution to this issue that doesn't involve triggering on every resize event. You can eliminate the class responsible for the transition after it has completed (see complete demo here):

$(function()
  {
    $(".nav").on("transitionend", function() {
        $(this).removeClass("activated");
    });
  }
)();

Answer 4

Discussing the side effect mentioned by Giona:

P.S. If you're looking to prevent the transition from occurring even after the user has opened the menu and then resized the window (...)

there is an alternative solution to this issue that doesn't involve triggering on every resize event. You can eliminate the class responsible for the transition after it has completed (see complete demo here):

$(function()
  {
    $(".nav").on("transitionend", function() {
        $(this).removeClass("activated");
    });
  }
)();

Answer 5

Answer №3

By merging insights from Giona and Janusz Kacalak (along with the contribution by Justin Bull), we have enhanced the code to ensure smooth transition of the navigation bar from open to closed state consistently, eliminating the initial animation glitch present in Giona's implementation.

function toggle() {
  var navbar = $(".nav");
  if (navbar.hasClass("active")) {
    // Closing the nav bar.
    navbar.removeClass("active");
    // Waiting for the transition event before removing the animation property.
    // Using `.one` ensures this callback is executed only once.
    navbar.one(whichTransitionEvent(), function() {
      // Remove animation property after the nav bar is closed.
      navbar.removeClass("activated");
    });
  } else {
    // Opening the nav bar.
    navbar.addClass("activated").addClass("active");
  }
}

// Reference: https://davidwalsh.name/css-animation-callback
function whichTransitionEvent() {
  var t;
  var el = document.createElement('fakeelement');
  var transitions = {
    'transition': 'transitionend',
    'OTransition': 'oTransitionEnd',
    'MozTransition': 'transitionend',
    'WebkitTransition': 'webkitTransitionEnd'
  };

  for (t in transitions) {
    if (el.style[t] !== undefined) {
      return transitions[t];
    }
  }
}

body { margin: 0; }
.toggle { display: none; }
.nav { list-style-type: none; margin: 0; padding: 0; }
.nav li { float: left; margin: 0; padding: 20px; background: #fdd; }
.nav li:nth-child(2n) { background: #dfd; }

@media only screen and (max-width: 599px)
{
    .toggle {
        display: block;
        position: relative;
        z-index: 2;
        padding: 20px;
        background: #eee;
    }
    .nav li {
        display: block;
        float: none;
    }
    .nav {
        display: block;
        position: relative;
        z-index: 1;
        transform: translate3d(0,-100%,0);
-webkit-transform: translate3d(0,-100%,0);
    }
    .nav.active {
        transform: translate3d(0,0,0);
-webkit-transform: translate3d(0,0,0);
    }
    .nav.activated {
        transition: transform 400ms linear;
-webkit-transition: -webkit-transform 400ms linear;
    }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<a href="#" class="toggle" onclick="javascript:toggle();return false;">Toggle menu</a>
<ul class="nav">
    <li>One</li>
    <li>Two</li>
    <li>Three</li>
    <li>Four</li>
    <li>Five</li>
</ul>

Answer 6

By merging insights from Giona and Janusz Kacalak (along with the contribution by Justin Bull), we have enhanced the code to ensure smooth transition of the navigation bar from open to closed state consistently, eliminating the initial animation glitch present in Giona's implementation.

function toggle() {
  var navbar = $(".nav");
  if (navbar.hasClass("active")) {
    // Closing the nav bar.
    navbar.removeClass("active");
    // Waiting for the transition event before removing the animation property.
    // Using `.one` ensures this callback is executed only once.
    navbar.one(whichTransitionEvent(), function() {
      // Remove animation property after the nav bar is closed.
      navbar.removeClass("activated");
    });
  } else {
    // Opening the nav bar.
    navbar.addClass("activated").addClass("active");
  }
}

// Reference: https://davidwalsh.name/css-animation-callback
function whichTransitionEvent() {
  var t;
  var el = document.createElement('fakeelement');
  var transitions = {
    'transition': 'transitionend',
    'OTransition': 'oTransitionEnd',
    'MozTransition': 'transitionend',
    'WebkitTransition': 'webkitTransitionEnd'
  };

  for (t in transitions) {
    if (el.style[t] !== undefined) {
      return transitions[t];
    }
  }
}

body { margin: 0; }
.toggle { display: none; }
.nav { list-style-type: none; margin: 0; padding: 0; }
.nav li { float: left; margin: 0; padding: 20px; background: #fdd; }
.nav li:nth-child(2n) { background: #dfd; }

@media only screen and (max-width: 599px)
{
    .toggle {
        display: block;
        position: relative;
        z-index: 2;
        padding: 20px;
        background: #eee;
    }
    .nav li {
        display: block;
        float: none;
    }
    .nav {
        display: block;
        position: relative;
        z-index: 1;
        transform: translate3d(0,-100%,0);
-webkit-transform: translate3d(0,-100%,0);
    }
    .nav.active {
        transform: translate3d(0,0,0);
-webkit-transform: translate3d(0,0,0);
    }
    .nav.activated {
        transition: transform 400ms linear;
-webkit-transition: -webkit-transform 400ms linear;
    }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<a href="#" class="toggle" onclick="javascript:toggle();return false;">Toggle menu</a>
<ul class="nav">
    <li>One</li>
    <li>Two</li>
    <li>Three</li>
    <li>Four</li>
    <li>Five</li>
</ul>

What steps can I take to stop a responsive navigation menu with CSS3 transitions from animating when the media queries change?

Welcome Message

Current Challenge

Answer №1

Answer №2

Answer №3

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