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	'''18w21a''' is the thirty-eighth [[Minecraft:snapshot]] for [[Minecraft:Java Edition 1.13]] released on May 23, 2018<ref>{{snap\|18w21a\|May 23, 2018}}</ref>.		'''18w21a''' is the thirty-eighth [[Minecraft:snapshot]] for [[Minecraft:Java Edition 1.13]] released on May 23, 2018,<ref>{{snap\|18w21a\|May 23, 2018}}</ref> which makes mobs' yaw head movement smooth and fixes bugs.

	== Additions ==		== Additions ==

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{{Infobox version
|title=Minecraft 18w21a
|image=18w21a.jpg
|image2=Java Edition 18w21a.png
|edition=Java
|type=Snapshot
|date=May 23, 2018
|parent=1.13
|prevparent=1.12.2
|nextparent=1.13.1
|clienthash=9b1d1486518585537a0d9e608dd27e3946880d48
|jsonhash=7cdac8c7c494291a01f151a5dc146f38a70c4a2b
|serverhash=2022a23da58dc55371b6a182fb1ba59742dc66a2
|prev=18w20c
|next=18w21b
}}<onlyinclude>

'''18w21a''' is the thirty-eighth [[Minecraft:snapshot]] for [[Minecraft:Java Edition 1.13]] released on May 23, 2018<ref>{{snap|18w21a|May 23, 2018}}</ref>.

== Additions ==
'''[[Minecraft:NBT format]]'''
* Added the <code>TreasurePosX</code>, <code>TreasurePosY</code>, <code>TreasurePosZ</code>, <code>GotFish</code>, and <code>CanFindTreasure</code> tags for [[Minecraft:dolphin]]s.

'''Settings'''
* New option in options.txt: mouseWheelSensitivity
** Defaults to 1.0
** Affects sensitivity of the {{mouse|scroll}} in-game

== Changes ==
'''Mobs'''
* [[Minecraft:Dolphin]]s now lead the player to treasures: when they are fed raw cod, they swim to the nearest [[Minecraft:shipwreck]] or [[Minecraft:underwater ruins]] if they can find one within their search radius.
* Mob yaw (left-right) head movement is now smooth.

'''NBT format'''
* The <code>ench</code> tag is now called <code>Enchantments</code>, and no longer has number IDs in each compound.

'''General'''
* Added (and fixed) item [[Minecraft:rarity]] colored tooltips for certain items:
{| class="wikitable sortable" data-description="Changed item tooltip's color"
! Item !! New rarity
|-
| [[Minecraft:Beacon]] || style="background-color: #5FF" | Rare
|-
| [[Minecraft:Chain command block]] || style="background-color: #F5F" | Epic
|-
| [[Minecraft:Command block]] || style="background-color: #F5F" | Epic
|-
| [[Minecraft:Conduit]] || style="background-color: #5FF" | Rare
|-
| [[Minecraft:Creeper head]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Dragon egg]] || style="background-color: #F5F" | Epic
|-
| [[Minecraft:Dragon head]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Dragon's breath]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Elytra]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Enchanted golden apple]] || style="background-color: #F5F" | Epic
|-
| [[Minecraft:Enchanted book]]s || style="background-color: #FF5" | Uncommon
|-
| Enchanted items (excluding books) || style="background-color: #5FF" | Rare
|-
| [[Minecraft:End crystal]] || style="background-color: #5FF" | Rare
|-
| [[Minecraft:Bottle o' enchanting]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Golden apple]] || style="background-color: #5FF" | Rare
|-
| [[Minecraft:Heart of the sea]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Music disc]]s || style="background-color: #5FF" | Rare
|-
| [[Minecraft:Nether star]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Player head]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Repeating command block]] || style="background-color: #F5F" | Epic
|-
| [[Minecraft:Skeleton skull]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Structure block]] || style="background-color: #F5F" | Epic
|-
| [[Minecraft:Totem of undying]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Wither skeleton skull]] || style="background-color: #FF5" | Uncommon
|-
| [[Minecraft:Zombie head]] || style="background-color: #FF5" | Uncommon
|-
| Attack speed (tools' info) || style="background-color: #0A0; color: #FFF" | Dark green
|-
| Attack damage (tools' info) || style="background-color: #0A0; color: #FFF" | Dark green
|}

== Fixes ==
{{fixes|fixedin=18w21a|prefix=Minecraft
|;old
| 52974 | Host's skin not visible to other players when in LAN world.
| 72866 | Item shading inside item frames does not account for rotation.
| 97196 | {{cmd|spreadplayers}} shows wrong error message / large number in error message when no entities were spread.
| 105139 | Entity head rotation not interpolating on Yaw axis.
| 116877 | Collision checking during Block placement only uses default state
|;dev
| 122369 | Village center is offset
| 122428 | Fire spread too quick
| 123199 | Lighting renders incorrectly on item frames oriented vertically.
| 123454 | Dispenser using spawn egg spawns mob too high.
| 123455 | Using spawn egg spawns mob too high on the water and lava.
| 123598 | Fence top missing texture when below fence gate.
| 123773 | Weird scrolling behavior starting in 18w01a
| 124954 | Jungle temple redstone wire is not connected.
| 125377 | Structures from old worlds don't regenerate if opened with 1.13 standalone client/server.
| 126086 | Salmon and tropical fish hitbox on land is wrongly positioned.
| 126863 | Sounds made with water in spectator mode.
| 127116 | When placing a wall using {{cmd|setblock}} without specifying a block state, it is invisible; default state has <code>up{{=}}false</code>.
| 127305 | Crash when creating a debug world
| 127333 | Carpet and panes don't show the right colors on maps.
| 127474 | Waterloggable blocks retain their waterlogged state when moved with pistons or slime blocks
| 127586 | Mobs do not suffocate in double slabs.
| 127996 | Bone meal can be put on floating water.
| 128139 | Sea grass generates water source when placed on flowing water.
| 128251 | Grass and mycelium can spread to dirt blocks which are submerged under general water.
| 128493 | Dolphins can wear armor.
| 129058 | Dolphins become permanent (can't despawn) after playing with an item.
| 129708 | Armor slot icons are backwards.
|;previous
| 129808 | <code>demo.day.6</code> does not include the keybinding correctly.
| 129849 | Upgrade from 1.6.4 destroys world, spams errors.
}}</onlyinclude>

== Videos ==
{{slicedlime|R8vLcuCIg1E}}

== Trivia ==
* This snapshot was released on [[Minecraft:wikipedia:World Turtle Day|World Turtle Day]].

== References ==
{{reflist}}

== Navigation ==
{{Navbox Java Edition versions|1.1x}}

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Minecraft:Java Edition 18w21a - Revision history

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