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A very !important lesson

JS Party: JavaScript, CSS, Web Development

CHAPTER

Forgiving List of Relative Selectors

The has is colon takes a forgiving list of relative selectors. When you put a selector list like that inside a paren, normally that's called a normal selector list. Those are not forgiving. You can make stuff that doesn't exist in a specific browser in that list. It'll be fine. So the is and the where was super useful once they were supported to test new features.

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