“Close button” bad practices

See #20 HTMHell special: close buttons for more details.

Pattern 1: div and background image

Pattern 2: div and icon

Pattern 3: div and font awesome icon

Pattern 4: A close link

Pattern 5: A close link with text

Pattern 6: A close link without the `href` attribute

Pattern 7: Placeholder link and img

Pattern 8: Radio button

Pattern 9: Button with icon

Pattern 10: Button with SVG

Pattern 11: Button with letter x