The 1.20.10.20 changelog says:
Java Parity: Block states in commands will use equals instead of colon in version 1.20.0 and later. For example using the setblock command: /setblock ~ ~ ~ oak_log["pillar_axis"="x"] (MCPE-168056)
This is still not Java Parity. Java does not use quotes around the keys or values.
How to reproduce
/setblock ~ ~ ~ oak_log[pillar_axis=y]Expected result
Log is placed
Observed result
Syntax error
Thank you for your report!
After consideration, the issue is being closed as Working as Intended.
Please note, that mechanics of the game may change between updates.
Things such as graphics, sounds, world creation, biomes, redstone, villagers, and animals may not work the same in current versions.
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