如何通过jQuery获取jQuery dropdown插件（嵌套Demo、ul实现）的选中值？

Hey there! I totally get the frustration when plugin docs skip key details and GitHub questions go unanswered. Let's break down how to grab that selected value from your ul-based dropdown, even without official methods.

First, Understand the Plugin's DOM Behavior #

Most custom ul dropdown plugins mark the selected item with a specific class (like selected, active, or current) or store the value in a data-* attribute on the clicked <li> element. Here's what to do first:

1. Open your browser's DevTools (F12) and head to the Elements tab.
2. Click on a dropdown option to select it.
3. Look at the corresponding <li> element—note any new classes added or data-value/similar attributes that hold the option's value.

Grab the Selected Value with jQuery #

Based on what you find in DevTools, use one of these approaches:

1. If the selected item has a unique class

Suppose the selected <li> gets a selected class. Use this to target it:

// Get the text content of the selected item
var selectedText = $('.dropdown-container .selected').text().trim();

// If there's a data-value attribute, grab that instead (more reliable for non-text values)
var selectedValue = $('.dropdown-container .selected').data('value');

Replace .dropdown-container with the actual class/ID of your top-level ul wrapper.

2. If you need to track selections in real-time

If the plugin doesn't automatically maintain a selected class, you can bind a click event to the dropdown items to manage the state yourself:

// Target all dropdown items (adjust the selector to match your setup)
$('.dropdown-item').on('click', function() {
    // Deselect all other items
    $('.dropdown-item').removeClass('selected');
    // Mark the clicked item as selected
    $(this).addClass('selected');
    
    // Grab the value—use data-value if available, else text
    var selectedValue = $(this).data('value') || $(this).text().trim();
    
    // Do whatever you need with the value (store it, update a hidden input, etc.)
    console.log('Selected Value:', selectedValue);
});

Troubleshooting the Plugin Not Working #

Since your nested ul demo isn't running correctly, check these quick fixes:

• Double-check that jQuery and the plugin's JS/CSS files are loaded correctly (no 404 errors in the DevTools Network tab).
• Verify your HTML structure matches the plugin's demo exactly—pay attention to class names, ul/li nesting, and any required wrapper elements.
• Check the DevTools Console tab for errors (like undefined variables or missing methods)—these usually point to the root issue.

内容的提问来源于stack exchange，提问作者Jack The Baker