Jen Kramer
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Understanding the universal selector
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Comparing the nth-child and nth-of-type pseudoclasses
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Introducing the nth-of-type pseudoclass
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Introducing the nth-child pseudoclass
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Labeling offsite and PDF links automatically, using attribute selectors
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Understanding attribute selectors
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Comparing rem and em units of measure in CSS
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Bootstrap 4 utility classes
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Bootstrap 4 and Sass
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Bootstrap 4 cards
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