html

The <span> tag is used to group inline-elements in a document.

The <span> tag provides no visual change by itself.

The <span> tag provides a way to add a hook to a part of a text or a part of a document.

When a text is hooked in a <span> element, you can style it with CSS, or manipulate it with JavaScript.

position:absolute;

Value Description Play it
static Default. Elements render in order, as they appear in the document flow Play it »
absolute The element is positioned relative to its first positioned (not static) ancestor element Play it »
fixed The element is positioned relative to the browser window Play it »
relative The element is positioned relative to its normal position, so “left:20” adds 20 pixels to the element’s LEFT position Play it »
inherit The value of the position property is inherited from the parent element

Overlapping Elements

When elements are positioned outside the normal flow, they can overlap other elements.

The z-index property specifies the stack order of an element (which element should be placed in front of, or behind, the others).

An element can have a positive(in front of) or negative(behind) stack order:

display:block;

Value Description Play it
none The element will not be displayed at all Play it »
box (or flex-box) The element is displayed as a block-level flex container box
block The element is displayed as a block-level element (like paragraphs and headers) Play it »
flex The element is displayed as a block-level flex container box
inline This is default. The element is displayed as an inline-level element (like span) Play it »
inline-block The element is placed as an inline element (on the same line as adjacent content), but it behaves as a block element
inline-flex The element is displayed as an inline-level flex container box
inline-table The element is displayed as an inline-level table
list-item The element is displayed as a list-item, which means that it has a bullet in front of it Play it »
table The element is displayed as a table
table-caption The element is displayed as a table caption
table-cell The element is displayed as a table cell
table-column The element is displayed as a table column
table-column-group The element is displayed as a table column group (like <colgroup>)
table-footer-group The element is displayed as a table footer row group
table-header-group The element is displayed as a table header row group
table-row The element is displayed as a table row
table-row-group The element is displayed as a table row group
inherit The value of the display property will be inherited from the parent element
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