CSS `content` Property

Description

The content CSS property is used in combination with the ::before and ::after pseudo-elements to generate content in an element.

The following table summarizes the usages context and the version history of this property.

Default value:	`normal`
Applies to:	The `::before` and `::after` pseudo-elements
Inherited:	No
Animatable:	No. See animatable properties.
Version:	CSS 2, 3

The syntax of the property is given with:

content:

The example below shows the content property in action.

h1::before {
    content: "Note: ";
    display: inline;
}

Note: The display CSS property controls whether the content generated using the content property is placed in a block-box or inline box.

The following table describes the values of this property.

Value	Description
`normal`	It computes to none for the `:before` and `:after` pseudo-elements. This is default value.
`none`	The pseudo-element is not generated.
`counter`	This value sets the `content` as a counter. See the `counter-reset` and `counter-increment` property for more information.
string	Inserts the specified string (text content).
`url(url)`	The value of `url()` designates an external resource (such as an image). If the resource or image can't be displayed, it is either ignored or some placeholder shows up.
`attr(attribute)`	This function inserts the value of specified attribute before or after the selected element(s). If the subject of the selector does not have the specified attribute, an empty string will be inserted. Note: The attribute names shouldn't be enclosed in quotes.
`open-quote`	Insert the opening quotation mark. These values are replaced by the appropriate string from the quotes property.
`close-quote`	Insert the closing quotation mark. These values are replaced by the appropriate string from the quotes property.
`no-open-quote`	Do not display the opening quotation mark, but increments (decrements) the level of nesting for quotes.
`no-close-quote`	Do not display the closing quotation mark, but increments (decrements) the level of nesting for quotes.
`initial`	Sets this property to its default value.
`inherit`	If specified, the associated element takes the computed value of its parent element `content` property.

The content property is supported in all major modern browsers.