Resources

CSS Selectors:

• MDN
• w3schools
• sitepoint
• HTML Dog

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CSS Types:

• w3schools
• VINEET GUPTA

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Pseudo Classes:

• MDN
• w3schools
• Growing with the Web
• GeeksforGeeks
• CSS-TRICKS
• HACKERNOON

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Pseudo Elements:

• MDN (selection)
• MDN (after)
• w3schools
• CSS-TRICKS (selection)
• CSS-TRICKS (before / after)
• Quora
• Growing with the Web