what does none mean in css

In CSS, "none" means that the attribute is invalid or removed. It can: delete the attribute so that it is as if it is not set. Indicates an invalid attribute value. Globally disabled properties. Hide mouse cursor, preserve text case, remove bullets.

The meaning of none in CSS

"none" is a special keyword in CSS that represents an element One of the previous attributes was removed or invalid.

Detailed explanation:

• Removing attributes: Assigning "none" to an attribute will remove the attribute, like It has never been set up the same. For example, applying "display: none;" to an element will make it hidden.
• Invalid attribute: "none" is also used to indicate an invalid value of an attribute. For example, "position: none;" is illegal because the "position" attribute only accepts specific values, such as "static", "relative", and "absolute".
• Global invalidation: "none" can also be used to globally disable an attribute. For example, "all: none;" removes all styles set on the element.

Other cases:

• Using "none" in the "cursor" attribute will hide the mouse cursor.
• Using "none" in the "text-transform" attribute will preserve the original case of the text.
• Using "none" in the "list-style-type" attribute will remove bullets or numbers.

It should be noted that "none" is only valid in specific contexts. If it is used for an inappropriate attribute, it will be ignored.

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