Databases
StackOverflow2013
Postsdbo
POClick menu item to highlight in Backbone View
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POClick menu item to highlight in Backbone View
    primarykey
    data
    text
    <p>This is a simple problem for beginner but so far I haven't seen a solution that fits my need. Basically I got a simple menu with <code>ul</code> and <code>li</code>. There are 2 requirements:</p> <p><strong>Req1:</strong> When click on one, the <code>li</code> will get new class <code>.active</code>. </p> <p><strong>Req2:</strong> Menu items are dynamic, meaning I should be able to add or remove any menu item (by using some other button).</p> <p>There are <em>2 ways</em> to do this:</p> <p><strong>Method 1: Tranversing for each MenuView as MenuItem</strong></p> <p>I have a MenuView with something like this</p> <pre><code>el: $('li'), events: { "click" : "highlight" }, highlight: function(e) { thisParent = $(e.target).parent(); thisParent.siblings('.active').removeClass('active'); thisParent.addClass('active'); }, </code></pre> <p><strong>Pro:</strong> Easy. This is what I have now.</p> <p><strong>Con:</strong> Dependency on the html structure. What if it's changed to <code>div</code> instead with many layers.</p> <p><strong>Method 2: One View for the MenuCollection</strong></p> <p>Create a MenuItemCollection and use MenuView for that collection instead. The <code>el</code> for MenuView will be <code>ul</code> (instead of <code>li</code>). The HTML will look like this with separate <code>id</code>:</p> <pre><code>&lt;ul&gt; &lt;li id="leftmenu-one"&gt;one&lt;/li&gt; &lt;li id="leftmenu-two"&gt;two&lt;/li&gt; &lt;li id="leftmenu-three"&gt;three&lt;/li&gt; &lt;/ul&gt; </code></pre> <p>Then when a click event is detected, do 2 things:</p> <p><strong>2a.</strong> Remove all <code>.active</code> class in <code>ul li</code> </p> <p><strong>2b.</strong> Add <code>.active</code> class to the <code>e.target</code> DOM</p> <p><strong>Pro:</strong> Decoupling html design</p> <p><strong>Con:</strong> Little more code. </p> <p><strong>QUESTION:</strong> I think most people would say <strong>Method 1</strong> is bad. But is there method 3, 4, 5... that are better? How to handle the adding of new menu item?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USHP.
    1. USHP.
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POClick menu item to highlight in Backbone View
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POClick menu item to highlight in Backbone View
      1. USAnthony Neace
      1. VTFavorite
    3. VO
      singulars
      1. POClick menu item to highlight in Backbone View
      1. This table or related slice is empty.
      1. VTUpMod
    1. COYour code is a bit too reliant on the HTML structure. You shouldn't be doing that much DOM traversal in Backbone, because each View contains it's own HTML references. Instead of traversing the DOM, isolate the correct View and then have it handle the traversal on a smaller scale. A good way to do this is with Backbone Events.
      singulars
      1. POClick menu item to highlight in Backbone View
      1. USCory Danielson
    2. CO@CoryDanielson Right I knew it and was checking other creative alternatives. Some reason your answer below was deleted. Can you repost? I'd love to keep it to study later.
      singulars
      1. POClick menu item to highlight in Backbone View
      1. USHP.
    3. COAlright, I undeleted it. The only difference between mine and the other answer is that I don't have `active` as part of the model, because I don't really see that as business data that would be saved in any database.. it'd be a wasted column.. it's more of a UI/view thing. Because of that, I don't have change:active, and threw a custom event instead.
      singulars
      1. POClick menu item to highlight in Backbone View
      1. USCory Danielson
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload