CSS Combinators

A combinator is something that explains the relationship between the selectors.

A CSS selector can contain more than one simple selector. Between the simple selectors, we can include a combinator.
There are four different combinators in CSS3:

• descendant selector (space)
• child selector (>)
• adjacent sibling selector (+)
• general sibling selector (~)

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Descendant Selector

The descendant selector matches all elements that are descendants of a specified element.
The following example selects all <p> elements inside <div> elements:

Example

div p {
    background-color: yellow;}

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Child Selector

The child selector selects all elements that are the immediate children of a specified element.
The following example selects all <p> elements that are immediate children of a <div> element:

Example

div > p {
    background-color: yellow;}

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Adjacent Sibling Selector

The adjacent sibling selector selects all elements that are the adjacent siblings of a specified element.
Sibling elements must have the same parent element, and "adjacent" means "immediately following".
The following example selects all <p> elements that are placed immediately after <div> elements:

Example

div + p {
    background-color: yellow;}

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General Sibling Selector

The general sibling selector selects all elements that are siblings of a specified element.
The following example selects all <p> elements that are siblings of <div> elements:

Example

div ~ p {
    background-color: yellow;}

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