# .fadeOut()

## fadeOut ( ) Returns: jQuery version added: 1.0

## fadeOut ( ) Returns: jQuery version added: 1.4.3

Description: Hide the matched elements by fading them to transparent.

The `.fadeOut()` method animates the opacity of the matched elements. Once the opacity reaches 0, the `display` style property is set to `none`, so the element no longer affects the layout of the page.

Durations are given in milliseconds; higher values indicate slower animations, not faster ones. The strings `'fast'` and `'slow'` can be supplied to indicate durations of `200` and `600` milliseconds, respectively. If any other string is supplied, or if the `duration` parameter is omitted, the default duration of `400` milliseconds is used.

We can animate any element, such as a simple image:

    <div id="clickme">
      Click here
    </div>
    <img id="book" src="book.png" alt="" width="100" height="123">

With the element initially shown, we can hide it slowly:

    $( "#clickme" ).click(function() {
      $( "#book" ).fadeOut( "slow", function() {
        // Animation complete.
      });
    });

Note: To avoid unnecessary DOM manipulation, `.fadeOut()` will not hide an element that is already considered hidden. For information on which elements jQuery considers hidden, see :hidden Selector.

#### Easing

As of jQuery 1.4.3, an optional string naming an easing function may be used. Easing functions specify the speed at which the animation progresses at different points within the animation. The only easing implementations in the jQuery library are the default, called `swing`, and one that progresses at a constant pace, called `linear`. More easing functions are available with the use of plug-ins, most notably the jQuery UI suite.

#### Callback Function

If supplied, the callback is fired once the animation is complete. This can be useful for stringing different animations together in sequence. The callback is not sent any arguments, but `this` is set to the DOM element being animated. If multiple elements are animated, it is important to note that the callback is executed once per matched element, not once for the animation as a whole.

As of jQuery 1.6, the `.promise()` method can be used in conjunction with the `deferred.done()` method to execute a single callback for the animation as a whole when all matching elements have completed their animations ( See the example for .promise() ).

## Examples:

#### Example: Animates all paragraphs to fade out, completing the animation within 600 milliseconds.

    <!doctype html>
    <html lang="en">
    <head>
      <meta charset="utf-8">
      <title>css demo</title>

      <style>

      p {
        font-size: 150%;
        cursor: pointer;
      }

      </style>

      <script src="//code.jquery.com/jquery-1.10.2.js"></script>
    </head>
    <body>

    <p>
      If you click on this paragraph
      you'll see it just fade away.
    </p>

    <script>

    $( "p" ).click(function() {
      $( "p" ).fadeOut( "slow" );
    });

    </script>

    </body>
    </html>

#### Demo:

#### Example: Fades out spans in one section that you click on.

    <!doctype html>
    <html lang="en">
    <head>
      <meta charset="utf-8">
      <title>css demo</title>

      <style>

      span {
        cursor: pointer;
      }
      span.hilite {
        background: yellow;
      }
      div {
        display: inline;
        color: red;
      }

      </style>

      <script src="//code.jquery.com/jquery-1.10.2.js"></script>
    </head>
    <body>

    <h3>Find the modifiers - <div></div></h3>
    <p>
      If you <span>really</span> want to go outside
      <span>in the cold</span> then make sure to wear
      your <span>warm</span> jacket given to you by
      your <span>favorite</span> teacher.
    </p>

    <script>

    $( "span" ).click(function() {
      $( this ).fadeOut( 1000, function() {
        $( "div" ).text( "'" + $( this ).text() + "' has faded!" );
        $( this ).remove();
      });
    });
    $( "span" ).hover(function() {
      $( this ).addClass( "hilite" );
    }, function() {
      $( this ).removeClass( "hilite" );
    });

    </script>

    </body>
    </html>

#### Demo:

#### Example: Fades out two divs, one with a "linear" easing and one with the default, "swing," easing.

    <!doctype html>
    <html lang="en">
    <head>
      <meta charset="utf-8">
      <title>css demo</title>

      <style>

      .box,
      button {
        float: left;
        margin: 5px 10px 5px 0;
      }
      .box {
        height: 80px;
        width: 80px;
        background: #090;
      }
      #log {
        clear: left;
      }

      </style>

      <script src="//code.jquery.com/jquery-1.10.2.js"></script>
    </head>
    <body>

    <button id="btn1">fade out</button>
    <button id="btn2">show</button>

    <div id="log"></div>

    <div id="box1" class="box">linear</div>
    <div id="box2" class="box">swing</div>

    <script>

    $( "#btn1" ).click(function() {
      function complete() {
        $( "<div>" ).text( this.id ).appendTo( "#log" );
      }
      $( "#box1" ).fadeOut( 1600, "linear", complete );
      $( "#box2" ).fadeOut( 1600, complete );
    });

    $( "#btn2" ).click(function() {
      $( "div" ).show();
      $( "#log" ).empty();
    });

    </script>

    </body>
    </html>

#### Demo: