Using Bootstrap to achieve accordion effect
Previous words
The Collapse plug-in (folding) in the Bootstrap framework is actually our common accordion effect. When a trigger element is clicked, it is displayed or hidden in another collapsible area, and the display state can be reversed when clicked again. The classic scene is the accordion style of multiple folding areas and the style of a single title/content. This article will introduce the Bootstrap accordion effect in detail
Structure
The most critical part of the accordion , that is, each title corresponds to a piece of content. In the Bootstrap framework, these two parts are combined and called a panel. As shown in the effect below, there are three panel panels. When these three panels are combined together, it is a panel. Combining panel-group, which is the structure of the accordion
, is simply a trigger and a folding area
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Declarative triggering
The trigger accordion can be triggered through the custom data-toggle attribute. The data-toggle value is set to collapse, data-target="#folding area identifier". Next let’s look at a simple example
Step one: Design a panel combination with three folding areas
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Step two: Add content to the panel , each panel includes two parts, the first is the panel title panel-heading, and the title panel-title is added inside. The second part is the panel content, which is the folding area, using the panel-collapse style
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Step 3: In order to bundle the title and content area together, you can use the anchor link method , connect the title area and the panel area together
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Step 4: Control whether the panel content area is visible. In the Bootstrap framework, if you want the content area to be invisible, you only need to add collapse to the panel-collapse style; if you want the content area to be visible by default, you need to add the style collapse and in
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Step 5: Activate the accordion interaction behavior. To complete the interactive behavior, you need to customize two attributes in the title link. One is data-toggle, and its value is collapse; the other is data-target, and its value is the identifier of each panel content area, such as ID. In this example, they are #panel1, #panel2 and #panel3 respectively:
[Note] It is okay not to add data-target="#panel1" in this case, because it is already there href="#panel1", but if the button button is used as the trigger, you must use the data-target="#panel1" statement
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Step 6: Define the data-parent attribute so that when one of the elements is clicked, all folding areas are closed, and then the clicked area is opened (if the clicked area is displayed, it will be closed). This data-parent value matches the identifier of the accordion panel container. For example, this example refers to #myAccordion
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. Through the above 6 steps, the following key points can be summarized
☑ Use the panel-title of the panel as the trigger element, and use the parent element of the panel-body as the folding area;
☑ Use a panel-group to contain multiple panels to achieve an accordion effect;
☑ Each trigger element in the panel must specify the data-parent attribute. The value of the data-parent attribute corresponds to the ID or other style identifier of the panel-group style element;
☑ The trigger element needs to be specified data-toggle, and the value is collapse;
☑ The trigger element needs to specify the data-target attribute. The value of the data-target attribute corresponds to the ID or other style identifier of the parent element of the panel-body; if it is an a element , you can specify the href attribute instead
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JS trigger
[Keyword]
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【Event】
This plug-in supports 4 types of event subscriptions
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The above is the detailed content of Using Bootstrap to achieve accordion effect. For more information, please follow other related articles on the PHP Chinese website!
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