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POwhen no checkboxes are selected show a message
 

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  1. POwhen no checkboxes are selected show a message
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    <p>I have a list of store names with check boxes attached. I have another list of taxonomies that belong to these stores. When I click on a store it only shows me the taxonomies that have the same value.</p> <p>I used this script to do that:</p> <pre><code>$(document).ready(function () { $(".store_checkbox").change(function () { $('div[store_id=' + this.value + ']').toggle(this.checked); }).change(); }); </code></pre> <p>Now I want to show a message under my taxonomies <strong>if no boxes are selected</strong></p> <p>How might do this?</p> <p>I tried:</p> <pre><code>$(document).ready(function () { if($('.store_checkbox').find('input[type=checkbox]:checked').length &gt; 0) { $("#hidden_taxon_message").show(); // any one is checked } else { $("#hidden_taxon_message").hide(); // none is checked } }); </code></pre> <p>but it just hides the message regardless if there are checked or unchecked boxes</p> <p>I also tried this :</p> <pre><code>$(function () { if($('.store_checkbox').not(':checked')){ alert("no check boxes"); } }); </code></pre> <p><strong>Updated script all together</strong></p> <pre><code>$(document).ready(function () { $(".store_checkbox").change(function () { $('div[store_id=' + this.value + ']').toggle(this.checked); }).change(); if(!$('.store_checkbox').is(':checked')){ $("#hidden_taxon_message").show(); // any one is checked } else { $("#hidden_taxon_message").hide(); // none is checked } }); </code></pre> <p><strong>Latest Update</strong></p> <pre><code>$(document).ready(function () { $(".store_checkbox").change(function () { $('div[store_id=' + this.value + ']').toggle(this.checked); }).change(); checkIfChecked(); }); $('.store_checkbox').on('change', function () { checkIfChecked(); }); function checkIfChecked() { if ($('.store_checkbox:checked').length == 0) { $("#hidden_taxon_message").show(); // none are checked } else { $("#hidden_taxon_message").hide(); // something is selected } } </code></pre> <p>this is what my js file looks like. the message doesnt seem <strong>TO HIDE</strong>. am I putting it in right?</p> <p><strong>Mark Up</strong></p> <pre><code> &lt;h3&gt;Stores Offered In&lt;/h3&gt; &lt;ul class="multi-column-checkbox"&gt; &lt;% for store in Store.all %&gt; &lt;li&gt;&lt;%= check_box_tag "idea[store_ids][]", store.id, @idea.stores.include?(store), :class =&gt; "store_checkbox" %&gt; &lt;%= store.name %&gt;&lt;/li&gt; &lt;% end %&gt; &lt;/ul&gt; &lt;br /&gt; &lt;hr /&gt; &lt;h3&gt;Taxonomies Offered In&lt;/h3&gt; &lt;% for store in Store.all %&gt; &lt;% if store.has_taxonomies? %&gt; &lt;div store_id='&lt;%= store.id %&gt;'&gt; &lt;h4&gt;&lt;%= store.name %&gt;&lt;/h4&gt; &lt;ul class="multi-column-checkbox"&gt; &lt;% for taxonomy in store.taxonomies %&gt; &lt;li&gt;&lt;%= check_box_tag "idea[taxonomy_ids][]", taxonomy.id, @idea.taxonomies.include?(taxonomy) %&gt; &lt;%= taxonomy.name %&gt;&lt;/li&gt; &lt;% end %&gt; &lt;/ul&gt; &lt;/div&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;div id="hidden_taxon_message"&gt; no checkboxes are selected &lt;/div&gt; </code></pre>
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    1. COBased on your question, you're logic seems backwards. If you want to show a message when 0 are selected, wouldn't you do == 0 instead of > 0, or switch your show() / hide()?
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    2. COIt looks like you are only testing whether to display the message once (upon document ready). It seems that you'll want to perform that test every time a checkbox is changed, right? Possible to include your HTML as well?
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    3. COdoes my updated question eliminate the upon document ready?
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