Give an item with a tag, and detect an item with a tag

[lapis leaf]

How can I give a player an item with a certain tag, and then detect if a player is holding that item?

[unborn forge]

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[static jetty]

what version?

[lapis leaf]

1.21

[static jetty]

give item with tag => /give @s stick[minecraft:custom_data={IAmACustomTag:1b}]
detecting it => /execute if items entity @s weapon minecraft:stick[minecraft:custom_data~{IAmACustomTag:1b}]

if you want to detect multiple different items with that tag, use * instead of the item id

if you didn't know, weapon checks for both hands

[lapis leaf]

so minecraft:*[minecraft:custom_data~{IAmACustomTag:1b}] ?

[static jetty]

without the minecraft: at the start

[lapis leaf]

ah ok

is it possible to check only for the main hand?

[static jetty]

weapon.mainhand

[lapis leaf]

ok thank you