Can Twitter Bootstrap alerts fade in as well as out?

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When I first saw the alerts in Bootstrap I thought they would behave like the modal window does, dropping down or fading in, and then fading out when closed. But it seems like they are always visible. I guess I could have them sit in a layer above my app and manage showing them but I was wondering if the functionality was built in?

thanks!

Edit, what I have so far:

<div id="saveAlert" class="alert-message success fade in" data-alert="alert" style="top:0">
  <a class="close" href="#">×</a>
  <p><strong>Well done!</strong> You successfully read this alert message.</p>
</div>

I strongly disagree with most answers previously mentioned.

Short answer:

Omit the "in" class and add it using jQuery to fade it in.

See this jsfiddle for an example that fades in alert after 3 seconds http://jsfiddle.net/QAz2U/3/

Long answer:

Although it is true bootstrap doesn't natively support fading in alerts, most answers here use the jQuery fade function, which uses JavaScript to animate (fade) the element. The big advantage of this is cross browser compatibility. The downside is performance (see also: jQuery to call CSS3 fade animation?).

Bootstrap uses CSS3 transitions, which have way better performance. Which is important for mobile devices:

Bootstraps CSS to fade the alert:

.fade {
  opacity: 0;
  -webkit-transition: opacity 0.15s linear;
  -moz-transition: opacity 0.15s linear;
  -o-transition: opacity 0.15s linear;
  transition: opacity 0.15s linear;
}
.fade.in {
  opacity: 1;
}

Why do I think this performance is so important? People using old browsers and hardware will potentially get a choppy transitions with jQuery.fade(). The same goes for old hardware with modern browsers. Using CSS3 transitions people using modern browsers will get a smooth animation even with older hardware, and people using older browsers that don't support CSS transitions will just instantly see the element pop in, which I think is a better user experience than choppy animations.

I came here looking for the same answer as the above: to fade in a bootstrap alert. After some digging in the code and CSS of Bootstrap the answer is rather straightforward. Don't add the "in" class to your alert. And add this using jQuery when you want to fade in your alert.

HTML (notice there is NO in class!)

<div id="myAlert" class="alert success fade" data-alert="alert">
  <!-- rest of alert code goes here -->
</div>

Javascript:

function showAlert(){
  $("#myAlert").addClass("in")
}

Calling the function above function adds the "in" class and fades in the alert using CSS3 transitions :-)

Also see this jsfiddle for an example using a timeout (thanks John Lehmann!): http://jsfiddle.net/QAz2U/3/

Can Twitter Bootstrap alerts fade in as well as out?, Alerts are available for any length of text, as well as an optional dismiss button. If the .fade and .show classes are present on the element, the alert will fade out  When I first saw the alerts in Bootstrap I thought they would behave like the modal window does, dropping down or fading in, and then fading out when closed. But it seems like they are always visib

The thing I use is this:

In your template an alert area

<div id="alert-area"></div>

Then an jQuery function for showing an alert

function newAlert (type, message) {
    $("#alert-area").append($("<div class='alert-message " + type + " fade in' data-alert><p> " + message + " </p></div>"));
    $(".alert-message").delay(2000).fadeOut("slow", function () { $(this).remove(); });
}
newAlert('success', 'Oh yeah!');

Alerts · Bootstrap, When I first saw the alerts in Bootstrap I thought they would behave like the modal window does, dropping down or fading in, and then fading  twitter-bootstrap documentation: Alert. Alert Types. Unlike some other Bootstrap components like Buttons, the Alerts do not come with a default or primary styling, because they are meant to alert the user in a specific way.

You can fade-in a box using jquery. Use bootstraps built in 'hide' class to effectively set display:none on the div element:

<div id="saveAlert" class="alert alert-success hide" data-alert="alert" style="top:0">
            <a class="close" href="#">×</a>
            <p><strong>Well done!</strong> You successfully read this alert message.</p>
        </div>

and then use the fadeIn function in jquery, like so:

$("#saveAlert").fadeIn();

There are also specify a duration for the fadeIn function, e.g: $("#saveAlert").fadeIn(400);

Full details on using the fadeIn function can be found on the official jQuery documentation site: http://api.jquery.com/fadeIn/

Just a sidenote as well, if you arent using jquery, you can either add the 'hide' class to your own CSS file, or just add this to your div:

 <div style="display:none;" id="saveAlert">

Your div will then basically be set to hidden as default, and then jQuery will perform the fadeIn action, forcing the div to be displayed.

Can Twitter Bootstrap alerts fade in as well as out?, Alert boxes are used quite often to stand out the information that requires immediate You can create a simple Bootstrap warning alert message box by adding the Error Alert --> <div class="alert alert-danger alert-dismissible fade show"> <strong>Error! Connect with us on Facebook and Twitter for the latest updates. Peut Twitter Bootstrap alertes de fade in et out? quand j'ai vu pour la première fois les alertes dans Bootstrap, j'ai pensé qu'elles se comporteraient comme la fenêtre modale le fait, en tombant ou en se dégradant, puis en se dégradant quand elle est fermée.

For 2.3 and above, just add:

$(".alert").fadeOut(3000 );

bootstrap:

<div class="alert success fade in" data-alert="alert" >
    <a class="close" data-dismiss="alert" href="#">&times;</a>
    // code 
</div>

Works in all browsers.

Bootstrap 4 Warning, Info, Success and Error Alerts, On ("click", function (e) { e. prevent Default (); $ ('í custom-alert–tweet ') . hide () . html ('Kdiv class="alert alert– twitter alert—dismissible fade show mt – 3" role=" The structure is pretty easy to grasp, so we will not delve into details here. With Bootstrap you can easily create elegant alert messages box for various purposes. You can also add an optional close button to dismiss any alert. You can create a simple Bootstrap warning alert message box by adding the contextual class .alert-warning to the .alert base class, as shown in the following example:

Add hide class to alert-message. Then put the following code after your jQuery script import:

$(document).ready( function(){
    $(".alert-message").animate({ 'height':'toggle','opacity':'toggle'});
    window.setTimeout( function(){
        $(".alert-message").slideUp();
    }, 2500);
});

If you want handle multiple messages, this code will hide them in ascending order:

$(document).ready( function(){
   var hide_delay = 2500;  // starting timeout before first message is hidden
   var hide_next = 800;   // time in mS to wait before hiding next message
   $(".alert-message").slideDown().each( function(index,el) {
      window.setTimeout( function(){
         $(el).slideUp();  // hide the message
      }, hide_delay + hide_next*index);
   });
});

Bootstrap 4 Cookbook, There is a very well written Bootstrap documentation with many HTML, CSS, and We will take a look at 10 of the most common Bootstrap mistakes, problems, and Alerts, Progress Bars, Modals, Tabs, Accordions, Carousels, and many more. We have specified that the modal won't close when user clicks outside the  Bootstrap Tutorial - Show alert block with fade in. Back to Alert ↑ The following code shows how to show alert block with fade in. Example <!

The 10 Most Common Bootstrap Mistakes That Developers Make , Taking a closer look at this function, you will see that we use jQuery to get a handle on doError= function (err) { alert(JSON.stringify(err)); } Using Twitter Bootstrap { $('.modal').modal('show'); } In addition to modifying the doSuccess function, House Registration <div id="myModal" class="modal hide fade" tabindex="-1"  Alerts. Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages. Examples. Alerts are available for any length of text, as well as an optional dismiss button.

Pro SharePoint 2013 Branding and Responsive Web Development, You can use all Bootstrap plugins purely through the markup API without writing the plugins name as a namespace along with the data-api namespace like this: To have your alerts animate out when closed, make sure they have the .fade  This alert box indicates a successful or positive action. This alert box indicates a neutral informative change or action. This alert box indicates a warning that might need attention. This alert box indicates a dangerous or potentially negative action. Alerts are created with the .alert class, followed by one of the four contextual classes

Javascript · Twitter Bootstrap 2.1.1 Documentation, Alerts are available for any text length, as well as an optional dismiss button. If the .fade and .show classes are present on the element, the alert will fade out  I am using AngularJS and Bootstrap 3. My web app has an "Update" button where it saves any changes the user makes. When the user clicks on the "Update" button, I want to activate and fade-in bootstrap's alert box saying "Information has been saved" and then fade-out after 3 seconds. I don't know how to create this function and may need some help..

Comments
  • Internet Explorer doesn't support the transition property and IE8 and below don't support opacity, you have to use the filter property.. so anyone wanting to use this approach, graceful degradation is advised.
  • Well, it does degrade gratefully. Namely by not fading in or out. If you really NEED the fading then the bootstrap approach is not for you. If it just adds some extra bling to your design and want a future/mobile proof website, do as I did: reward users with modern browsers with pretty animations, and omit these for those who don't. Instead of giving them potentially choppy/laggy animations because they use outdated hardware/software.
  • I've posted an alternative answer below. While, I'm in agreement that this answer is best for performance, I think it pollutes the markup. It's not clear that the classes fade and in are associated. As seen in the markup class="alert alert-success fade in". The in class looks like a completely independent class, like alert or alert-success. It would be better to use the class-name faded-in (and fade should be faded), the transition is temporary, but the class-name lives on.
  • To make this work in Bootstrap 4, use the "show" class instead of "in"
  • This doesn't fade the alert-message in for me, it just shows it.
  • This will no longer work as of Bootstrap 3 - see github.com/twbs/bootstrap/pull/6342 under Miscellaneous
  • Elegant and simple, thanks. I like the fact that there is no need to write js. There is a way to change the fade behavoir, like make fading longer?