Invulnerable Entities

Using Damage Sensor ​

The best and most flexible way of disabling damage for entities is using the minecraft:damage_sensor component. The component allows us to use filters to determine which damage sources can damage our entity.

The best way to learn about this component is by using the vanilla examples for damage sensor or reading documentation

Completely Invulnerable Entity ​

"minecraft:damage_sensor": {
    "triggers": {
        "cause": "all",
        "deals_damage": false
    }
}

Disable Damage from Player ​

"minecraft:damage_sensor": {
    "triggers": {
        "on_damage": {
            "filters": {
                "test": "is_family",
                "subject": "other",
                "value": "player"
            }
        },
        "deals_damage": false
    }
}

Min Health ​

The min property in the minecraft:health component allows us to make invincible entities that cannot die. This includes when using /kill @e. This is not considered a good solution because entities like this are hard to get rid of.

If you choose to use this component, please make sure you have another method for killing the entity. Triggering minecraft:instant_despawn from something like an environment sensor, a timer, or an interact is a good solution. You also can call it using /event.

"minecraft:health": {
    "value": 1,
    "max": 1,
    "min": 1
}

Note that setting it to 0 breaks some death and spawn animations/effects.