How to implement nesting of Bootstrap lists?

Nested lists in Bootstrap require the use of Bootstrap's grid system to control the style. First create a list with the outer layer

and <li>, then wrap the inner layer list in
and add

to the inner layer list to specify that the inner layer list occupies half the width of a row. In this way, the inner list can have the appropriate style without destroying the outer list structure.



Bootstrap list nesting? This question is awesome! Many newbies will get stuck here. On the surface, the list component of Bootstrap is quite simple, but it is really a bit tricky to play with nesting. Nesting directly with <ul></ul> and <li> ? Of course, it can be, but the effect may not be as good as you expected, and it will even be messy. The key is to understand Bootstrap's mesh system and some CSS tips.

Let's first review the basics of the Bootstrap list. <ul class="list-group"></ul> This is a commonly used class that will give you a list with rounded borders. <li class="list-group-item"> Each list item uses this class. It's that simple? Yes, it's that simple, but to nest, you have to think about it.

Nesting <li> <ul></ul> This works, but the style may be wrong. Bootstrap's styles make the inner list look weird because the default style does not take into account nesting. Therefore, we have to do it ourselves and have enough food and clothing.

Here is a tip: use Bootstrap's column layout to control the style of nested lists. Don't be scared, it's actually very simple. We use a grid system to place the inner layer list in a column so that we can control its width and position.

Let's see the code:

 <code class="html"><div class="container"> <div class="row"> <div class="col-md-6"> <ul class="list-group"> <li class="list-group-item">Item 1</li> <li class="list-group-item"> <div class="row"> <div class="col-md-12"> <ul class="list-group"> <li class="list-group-item">Nested Item 1</li> <li class="list-group-item">Nested Item 2</li> </ul> </div> </div> </li> <li class="list-group-item">Item 3</li> </ul> </div> </div> </div></code>

See? I wrapped the inner list with row and col-md-6 . col-md-6 means that this inner layer list occupies half of a row's width. You can adjust this value as needed. In this way, the inner list can have the appropriate style and will not destroy the structure of the outer list.

Of course, this is just one of the methods. You can also use other Bootstrap components, such as cards, to implement nested lists, which may be more beautiful. It depends on your specific design needs.

Regarding performance, the performance overhead of this method is basically negligible. Bootstrap itself is designed to be efficient, and there will be no performance issues unless you have a huge number of list items. However, in order to maintain the readability and maintainability of the code, it is recommended that you try to keep the list structure concise as much as possible. Don't nest too many layers, otherwise the code will become difficult to understand.

In short, the key to nesting Bootstrap lists is to cleverly use Bootstrap's grid system rather than relying directly on the default style. Try more and practice more and you will be able to master this skill. Remember, code is dead, people are alive, and flexible application is the king!

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