What is the main significance of the display property…

The display property determines how an element is displayed in the document and how it interacts with other elements, participating in the layout flow. It sets the formatting context type of the element.

Main values:

block: The element is formatted as a block. It takes up the full available width, starts on a new line, and can have set sizes (width, height).
inline: The element is formatted as inline. It does not start on a new line, only takes up as much width as necessary, and cannot have set sizes (width, height). Vertical margins (margin-top, margin-bottom) and paddings (padding-top, padding-bottom) do not affect surrounding elements.
inline-block: The element is formatted as inline but behaves as a block inside the line. It does not start a new line, can have set sizes (width, height), and vertical margins and paddings that affect surrounding elements.
none: The element and its content are not displayed. The element is completely removed from the document flow and does not occupy space.
flex: The element becomes a Flex container, and its direct children are Flex items. Used for creating flexible layouts.
grid: The element becomes a Grid container. Used for creating grid-based layouts.

How it works:

The browser uses the display value to determine the formatting context type in which the element resides. This affects:

Document flow: How the element is positioned relative to its neighbors.
Element sizes: The ability to set width and height, and how content influences sizes.
Impact on surrounding elements: How margins and sizes of the element affect the positioning of other elements.

Example:

/* Element with display: block */
div {
  display: block;
  width: 100%; /* Takes full width */
  margin-bottom: 10px; /* Creates vertical margin */
}

/* Element with display: inline */
span {
  display: inline;
  /* width and height are ignored */
  /* margin-top and margin-bottom are ignored */
}

/* Element with display: inline-block */
img {
  display: inline-block;
  width: 100px; /* Width can be set */
  height: 100px; /* Height can be set */
  margin: 5px; /* Creates margins on all sides */
}

/* Element hidden */
.hidden {
  display: none;
}

What is the main significance of the display property in CSS and how does it work?