CSS properties i have overlooked

resize

resize: none | both | vertical | horizontal | ...

→ makes element resizable (like texbox). Great for responsive demo. doc, caniuse

text-decoration styling

text-decoration: -line -style -color

/* shorthand example */ 
text-decoration: undeline solid red

keyword: text-decoration styling. example, caniuse

text-decoration-skip: ink

clears decenders etc. doc and more values: mdn, css-tricks . caniuse

display: contents | flow-root

• contents: makes element 'transparent' as if it does not exist in the dom => children of element become the same level => eg. as substitute for sub-grid, at the time FF only: caniuse
  
• flow-root: elemnt becomes container box => same result as clearfix-hack. caniuse