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Informations about the package yii2-bandoneon
Bandoneon 2.0
Lightweight accordion widget for Yii2
Motivation
In my opinion, there are some issues with the standard Yii2 JUI Accordion widget.
- The heading and the content of the sections must be provided as options to the widget, which is cumbersome.
- It generates HTML with hard wired class references, introducing new and probably unintended styling.
- It is overkill, being dependant on the complete jQuery UI library.
Bandoneon is a lightweight, versatile replacement widget for the JUI Accordion. The Javascript is less than 1400 bytes. It has no dependencies at all, so it could be used on jQuery-less pages.
Here are some demo's of the Bandoneon widget.
Installation
The preferred way to install Bandoneon is through Composer. Either add the following to the require section of your composer.json file:
"sjaakp/yii2-bandoneon": "*"Or run:
composer require sjaakp/yii2-bandoneon "*"You can manually install Bandoneon by downloading the source in ZIP-format.
Usage
Use Bandoneon by enclosing the sections in straight HTML between calls to Bandoneon::begin() and Bandoneon::end(), like so:
<h4>Heading 1</h4>
<div>Lorem ipsum ... felis ultricies.</div>
<h4>Heading 2</h4>
<div>Pellentesque aliquet ... placerat tincidunt.</div>
...
<h4>Heading n</h4>
<div>Curabitur sit ... gravida nec turpis.</div>You can use any sensible HTML tags for the headings and the sections. For instance, this works just as well:
<p>Heading 1</p>
<p>Lorem ipsum ... felis ultricies.</p>
<p>Heading 2</p>
<p>Pellentesque aliquet ... placerat tincidunt.</p>
...
<p>Heading n</p>
<p>Curabitur sit ... gravida nec turpis.</p>Bandoneon makes no assumptions about the HTML of the headings and the sections. It uses the CSS selectors for odd and even elements to differentiate between them. The HTML in the sections, and in the headings as well, can be as convoluted as you like.
Initially open
If you want a section to be initially open, just add the class "open" to its heading, like so:
...
<h4 class="open">Heading 2</h4>
<div>This section will be initially open...</div>
...Surrounding element
By default, Bandoneon creates a <div> as surrounding element. You can modify this by setting the 'tag' option in Bandoneon::begin().
This may come in handy if you want to create a Bandoneon, based on a HTML definition list <dl>:
<dt>Heading 1</dt>
<dd>Lorem ipsum ... felis ultricies.</dd>
<dt>Heading 2</dt>
<dd>Pellentesque aliquet ... placerat tincidunt.</dd>
...
<dt>Heading n</dt>
<dd>Curabitur sit ... gravida nec turpis.</dd>Options
Bandoneon has two client options:
speed: The speed of the opening and closing of a section, in pixels per second. Default:200.timing: The timing function of the animation. More information on Mozilla developers network. Default:ease-in-out.
A very slow Bandoneon might be coded like this:
<h4>Heading 1</h4>
<div>Lorem ipsum ... felis ultricies.</div>
...Building bandoneon.js
Be sure that npm is installed.
Run npm install.
Run rollup -c.
