In 1.8, there is no attack cooldown. Players can click as fast as humanly possible (or use auto-clickers) to deal maximum damage. This creates a high-octane playstyle where the player with the faster reaction time and better aim wins, rather than the player with the better timing.
"Minecraft Unblocked" refers to versions of the game that can be played within a web browser, bypassing network restrictions that typically block executable files (like the official Minecraft launcher) or gaming websites. minecraft unblocked 1.8
In versions after 1.8, shields were introduced. In 1.8, players "block" by right-clicking with their sword. This reduces incoming damage by 50%. The meta-game involves rapidly toggling between blocking (to reduce damage) and attacking (to deal damage), known as "Block Hitting." shields were introduced. In 1.8