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| author | Mark Otto <[email protected]> | 2014-07-12 02:17:42 -0700 |
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| committer | Mark Otto <[email protected]> | 2014-07-12 02:17:42 -0700 |
| commit | 2e4bbb1cb6d8bed29816a3d82b2cd0c7a427112c (patch) | |
| tree | 588ab84d2439161af199cd20d8d8fc949c51c570 /docs/javascript/affix.md | |
| parent | 0610c94244f8067819fa7e0ca1d89a2cd82f74d0 (diff) | |
| download | bootstrap-2e4bbb1cb6d8bed29816a3d82b2cd0c7a427112c.tar.xz bootstrap-2e4bbb1cb6d8bed29816a3d82b2cd0c7a427112c.zip | |
move over all js pages
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| -rw-r--r-- | docs/javascript/affix.md | 115 |
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diff --git a/docs/javascript/affix.md b/docs/javascript/affix.md new file mode 100644 index 000000000..4ce51cb34 --- /dev/null +++ b/docs/javascript/affix.md @@ -0,0 +1,115 @@ +<div class="bs-docs-section"> + <h1 id="affix" class="page-header">Affix <small>affix.js</small></h1> + + <h2 id="affix-examples">Example</h2> + <p>The subnavigation on the right is a live demo of the affix plugin.</p> + + <hr class="bs-docs-separator"> + + <h2 id="affix-usage">Usage</h2> + <p>Use the affix plugin via data attributes or manually with your own JavaScript. <strong class="text-danger">In both situations, you must provide CSS for the positioning and width of your affixed content.</strong></p> + + <h3>Positioning via CSS</h3> + <p>The affix plugin toggles between three classes, each representing a particular state: <code>.affix</code>, <code>.affix-top</code>, and <code>.affix-bottom</code>. You must provide the styles for these classes yourself (independent of this plugin) to handle the actual positions.</p> + <p>Here's how the affix plugin works:</p> + <ol> + <li>To start, the plugin adds <code>.affix-top</code> to indicate the element is in its top-most position. At this point no CSS positioning is required.</li> + <li>Scrolling past the element you want affixed should trigger the actual affixing. This is where <code>.affix</code> replaces <code>.affix-top</code> and sets <code>position: fixed;</code> (provided by Bootstrap's code CSS).</li> + <li>If a bottom offset is defined, scrolling past that should replace <code>.affix</code> with <code>.affix-bottom</code>. Since offsets are optional, setting one requires you to set the appropriate CSS. In this case, add <code>position: absolute;</code> when necessary. The plugin uses the data attribute or JavaScript option to determine where to position the element from there.</li> + </ol> + <p>Follow the above steps to set your CSS for either of the usage options below.</p> + + <h3>Via data attributes</h3> + <p>To easily add affix behavior to any element, just add <code>data-spy="affix"</code> to the element you want to spy on. Use offsets to define when to toggle the pinning of an element.</p> + +{% highlight html %} +<div data-spy="affix" data-offset-top="60" data-offset-bottom="200"> + ... +</div> +{% endhighlight %} + + <h3>Via JavaScript</h3> + <p>Call the affix plugin via JavaScript:</p> +{% highlight js %} + $('#my-affix').affix({ + offset: { + top: 100 + , bottom: function () { + return (this.bottom = $('.footer').outerHeight(true)) + } + } + }) +{% endhighlight %} + + + <h3>Options</h3> + <p>Options can be passed via data attributes or JavaScript. For data attributes, append the option name to <code>data-</code>, as in <code>data-offset-top="200"</code>.</p> + + <div class="table-responsive"> + <table class="table table-bordered table-striped"> + <thead> + <tr> + <th style="width: 100px;">Name</th> + <th style="width: 100px;">type</th> + <th style="width: 50px;">default</th> + <th>description</th> + </tr> + </thead> + <tbody> + <tr> + <td>offset</td> + <td>number | function | object</td> + <td>10</td> + <td>Pixels to offset from screen when calculating position of scroll. If a single number is provided, the offset will be applied in both top and bottom directions. To provide a unique, bottom and top offset just provide an object <code>offset: { top: 10 }</code> or <code>offset: { top: 10, bottom: 5 }</code>. Use a function when you need to dynamically calculate an offset.</td> + </tr> + <tr> + <td>target</td> + <td>selector | node | jQuery element</td> + <td>the <code>window</code> object</td> + <td>Specifies the target element of the affix.</td> + </tr> + + </tbody> + </table> + </div><!-- /.table-responsive --> + + + <h3>Events</h3> + <p>Bootstrap's affix class exposes a few events for hooking into affix functionality.</p> + <div class="table-responsive"> + <table class="table table-bordered table-striped"> + <thead> + <tr> + <th style="width: 150px;">Event Type</th> + <th>Description</th> + </tr> + </thead> + <tbody> + <tr> + <td>affix.bs.affix</td> + <td>This event fires immediately before the element has been affixed.</td> + </tr> + <tr> + <td>affixed.bs.affix</td> + <td>This event is fired after the element has been affixed.</td> + </tr> + <tr> + <td>affix-top.bs.affix</td> + <td>This event fires immediately before the element has been affixed-top.</td> + </tr> + <tr> + <td>affixed-top.bs.affix</td> + <td>This event is fired after the element has been affixed-top.</td> + </tr> + <tr> + <td>affix-bottom.bs.affix</td> + <td>This event fires immediately before the element has been affixed-bottom.</td> + </tr> + <tr> + <td>affixed-bottom.bs.affix</td> + <td>This event is fired after the element has been affixed-bottom.</td> + </tr> + </tbody> + </table> + </div><!-- /.table-responsive --> +</div> |
