mirror of
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309 lines
8.1 KiB
HTML
309 lines
8.1 KiB
HTML
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<section>
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<div class="page-header">
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<h1 id="dropdown">Dropdown</h1>
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</div>
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<p>
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Select2 allows you to change the way that the dropdown works, allowing you
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to do anything from attach it to a different location in the document or
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add a search box.
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</p>
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<h2 id="dropdownParent">
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Attached to body
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</h2>
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<p>
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By default, Select2 will attach the dropdown to the end of the body and
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will absolutely position it to appear below the selection container.
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</p>
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<div class="row">
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Key</dt>
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<dd><code>dropdownParent</code></dd>
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<dt>Value</dt>
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<dd>jQuery element or DOM node</dd>
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<hr />
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<dt>Adapter</dt>
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<dd>
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<code title="select2/dropdown">DropdownAdapter</code>
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</dd>
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<dt>Decorator</dt>
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<dd>
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<code title="select2/dropdown/attachBody">AttachBody</code>
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</dd>
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</dl>
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</div>
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<div class="col-sm-6">
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<div class="alert alert-warning">
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<strong>Heads up!</strong>
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This will cause DOM events to be raised outside of the standard
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Select2 DOM container. This can cause issues with
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third-party components such as modals.
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</div>
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</div>
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</div>
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<p>
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When the dropdown is attached to the body, you are not limited to just
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displaying the dropdown below the container. Select2 will display above
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the container if there is not enough space below the container, but there
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is enough space above it. You are also not limited to displaying the
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dropdown within the parent container, which means Select2 will render
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correctly inside of modals and other small containers.
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</p>
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<h2 id="dropdown-attachContainer">
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Attached below the container
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</h2>
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<p>
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Select2 can place the dropdown directly after the selection container, so
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it will appear in the same location within the DOM as the rest of Select2.
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</p>
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<div class="row">
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Adapter</dt>
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<dd>
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<code title="select2/dropdown">DropdownAdapter</code>
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</dd>
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<dt>Decorator</dt>
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<dd>
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<code title="select2/dropdown/attachContainer">AttachContainer</code>
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</dd>
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</dl>
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</div>
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<div class="col-sm-6">
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<div class="alert alert-warning">
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<strong>Check your build.</strong> This module is only included in the
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<a href="index.html#builds-full" class="alert-link">full builds</a> of
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Select2.
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</div>
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</div>
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</div>
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<div class="alert alert-info">
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<strong>
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<a href="https://harvesthq.github.io/chosen/">Harvest Chosen</a>
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migrators!
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</strong>
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If you are migrating to Select2 from Chosen, this option will cause
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Select2 to position the dropdown in a similar way.
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</div>
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<h2 id="dropdown-search">
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Search
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</h2>
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<p>
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Users can filter down the results by typing a search term into a box that
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is displayed at the top of the dropdown.
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</p>
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<dl class="dl-horizontal">
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<dt>Adapter</dt>
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<dd>
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<code title="select2/dropdown">DropdownAdapter</code>
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</dd>
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<dt>Decorator</dt>
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<dd>
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<code title="select2/dropdown/search">DropdownSearch</code>
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</dd>
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</dl>
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<p>
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A search box is added to the top of the dropdown automatically for select
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boxes where only a single option can be selected.
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</p>
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<h3 id="dropdown-minimumInputLength">
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Minimum search term length to filter results
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</h3>
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<p>
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Sometimes when working with large data sets, it is more efficient to start
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filtering the results when the search term is a certain length. This is
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very common when working with remote data sets, as allows for only
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significant search terms to be used.
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</p>
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<div class="row">
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Key</dt>
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<dd><code>minimumInputLength</code></dd>
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<dt>Value</dt>
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<dd>integer</dd>
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</dl>
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</div>
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Adapter</dt>
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<dd>
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<code title="select2/data/base">DataAdapter</code>
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</dd>
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<dt>Decorator</dt>
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<dd>
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<code title="select2/data/minimumInputLength">MinimumInputLength</code>
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</dd>
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</dl>
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</div>
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</div>
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<h3 id="dropdown-maximumInputLength">
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Maximum search term length to filter results
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</h3>
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<p>
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In some cases, search terms need to be limited to a certain range. Select2
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allows you to limit the length of the search term such that it does not
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exceed a certain length.
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</p>
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<div class="row">
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Key</dt>
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<dd><code>maximumInputLength</code></dd>
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<dt>Value</dt>
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<dd>integer</dd>
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</dl>
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</div>
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Adapter</dt>
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<dd>
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<code title="select2/data/base">DataAdapter</code>
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</dd>
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<dt>Decorator</dt>
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<dd>
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<code title="select2/data/maximumInputLength">MaximumInputLength</code>
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</dd>
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</dl>
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</div>
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</div>
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<h3 id="dropdown-maximumInputLength">
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Minimum results to display the search box
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</h3>
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<p>
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When working with smaller data sets, the search box can take up more space
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that is necessary, as there are not enough results for filtering to be
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effective. Select2 allows you to only display the search box when the
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number of search results reaches a certain threshold.
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</p>
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<div class="row">
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Key</dt>
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<dd><code>minimumResultsForSearch</code></dd>
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<dt>Value</dt>
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<dd>integer</dd>
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</dl>
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</div>
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Adapter</dt>
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<dd>
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<code title="select2/dropdown">DropdownAdapter</code>
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</dd>
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<dt>Decorator</dt>
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<dd>
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<code title="select2/dropdown/minimumResultsForSearch">MinimumResultsForSearch</code>
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</dd>
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</dl>
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</div>
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</div>
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<h2 id="dropdown-select-on-close">
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Select the highlighted option on close
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</h2>
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<p>
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When users close the dropdown, the last highlighted option can be
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automatically selected. This is commonly used in combination with
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<a href="#tags">tagging</a> and <a href="#placeholder">placeholders</a>
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and other situations where the user is required to select an option, or
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they need to be able to quickly select multiple options.
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</p>
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<dl class="dl-horizontal">
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<dt>Adapter</dt>
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<dd>
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<code title="select2/results">ResultsAdapter</code>
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</dd>
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<dt>Decorator</dt>
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<dd>
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<code title="select2/dropdown/selectOnClose">SelectOnClose</code>
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</dd>
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</dl>
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<h2 id="closeOnSelect">
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Close the dropdown when a result is selected
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</h2>
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<p>
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Select2 will automatically close the dropdown when an element is selected,
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similar to what is done with a normal select box. This behavior can be
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changed though to keep the dropdown open when results are selected,
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allowing for multiple options to be selected quickly.
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</p>
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<div class="row">
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Key</dt>
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<dd><code>closeOnSelect</code></dd>
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<dt>Default</dt>
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<dd><code>true</code></dd>
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</dl>
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</div>
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<div class="col-sm-6">
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<dl class="dl-horizontal">
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<dt>Adapter</dt>
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<dd>
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<code title="select2/dropdown">DropdownAdapter</code>
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</dd>
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<dt>Decorator</dt>
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<dd>
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<code title="select2/dropdown/closeOnSelect">CloseOnSelect</code>
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</dd>
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</dl>
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</div>
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</div>
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<p>
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If this decorator is not used (or <code>closeOnSelect</code> is set to
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<code>false</code>), the dropdown will not automatically close when a
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result is selected. The dropdown will also never close if the
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<kbd>ctrl</kbd> key is held down when the result is selected.
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</p>
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</section>
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