Question

what is the use of display box?​

Answer 1

Answer:

A display case (also called showcase, display cabinet, or vitrine) is a cabinet with one or often more transparent tempered glass (or plastic, normally acrylic for strength) surfaces, used to display objects for viewing. A display case may appear in an exhibition, museum, retail store, restaurant, or house.

Answer 2

Answer:

In CSS everything generates boxes. A webpage is essentially a set of block and inline boxes, something you get to understand very well if you open up DevTools in your favorite browser and start selecting elements on the page. You can see the boxes that make up the layout, and how their margins, padding and borders are applied.....

Controlling Box Generation

The none and contents values of display deal with whether boxes should appear at all. If you have elements in your markup and don’t want them to generate a box in CSS then you need to somehow suppress generation of the box. There are two possible things you might want to do. Which are:

• Prevent generation of a box and all of its children.
• Prevent generation of a box but still display the children.
• We can take a look at each of these scenarios in turn.

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Feature Panel...

The none value of display is how we prevent the generation of a box and all the children of that box. It acts as if the element was not there at all. Therefore, it is useful in situations where you intend to completely hide that content, perhaps because it will be revealed later after activating a link.

If I have an example with a paragraph, an unordered list, and another paragraph you can see that the items are displaying in normal flow. The ul has a background and border applied, plus some padding.

See the Pen Box Generation example by Rachel Andrew.

If I add display: none to the ul it disappears from the visual display, taking with it the children of the ul plus the background and border.

• See the Pen Box Generation example display: none by Rachel Andrew.

If you use display: none it hides the content from all users of the website. This includes screen reader users. Therefore, you should only use this if your intention is that the box and everything inside it is completely hidden to everyone.

There are situations where you might want to add additional information for users of assistive technology like screen readers but hide it for other users; in such cases, you need to use a different technique. Some excellent suggestions are made by Scott O ’Hara in his article “Inclusively Hidden”.

Using display: none is therefore pretty straightforward. Use it in a situation where you want a box and contents to vanish from the display, from the box tree, and from the accessibility tree (as if it were never there in the first place).

DISPLAY: CONTENTS

For the second scenario, we need to look at a much newer value of display. The value display: contents will remove the box it is applied to from the box tree in the same way that display: none does, but leave the children in place. This causes some useful behavior in terms of things we can then do in our layouts. Let’s look at a simple example and then explore further.

I am using the same example as before, but this time I have used display: contents on the ul. The list items are now visible, however, they have no background and borders and are acting as if you have added li elements to the page without any