5.3 Universal selector

Chapter 5 - Selectors - 5.3 Universal selector

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universal-selector-001
Universal selector
The universal selector applies to all elements.
universal-selector-002
Implied universal selector for pseudo selector
If the universal selector is not the only component of a simple pseudo selector the '*' can be omitted.
universal-selector-003
Implied universal selector for class selector
If the universal selector is not the only component of a simple class selector the * can be omitted.
universal-selector-004
Implied universal selector for ID
If the universal selector is not the only component of a simple id selector the * can be omitted.
universal-selector-005 (image)
universal selector - list-style-image
The universal selector matches the name of any element type. 'list-style-image' applies to elements with 'display: list-item'.