Bedrock Wiki
  • Discord
  • Contribute
  • bedrock.dev
  • MS Learn
Beginner's Guide
  • Guide
    • 1. Introduction
      guide
    • 2. Add-Ons Explained
    • 3. Software & Preparation
    • 4. Project Setup
    • 5. Create a Custom Item
    • 6. Create a Custom Entity
    • 7. Blockbench: Modeling, Texturing & Animating
    • 8. Adding a Loot Table, Spawn Rule & Crafting Recipe
  • Extra
    • a. Understanding JSON
    • b. Download Example Packs
    • c. Troubleshooting
      help
    • d. Advanced Manifest
    • e. Format Versions
    • f. Project Setup Android
Animation Controllers
  • Intro to Animation Controllers
    guide
  • Entity Commands
  • AFK Detector
  • Death Commands
  • Molang into Scoreboard
  • Respawn Commands
Blocks
  • General
    • Intro to Blocks
      guide
    • Block Components
    • Block Tags
    • Block States
    • Block Traits
    • Block Permutations
    • Block Events
      Scripts
    • Block Event Migration
      help
    • Blocks as Items
    • Troubleshooting Blocks
      help
  • Visuals
    • Block Culling
    • Block Models
      guide
    • Block Texture Animation
    • Block Texture Variation
    • Block Tinting
  • Tutorials
    • Applying Constant Effects
      Scripts
    • Avoiding State Limit
    • Fake Blocks
    • Ore Loot Tables
      Scripts
    • Precise Interaction
      Scripts
    • Precise Rotation
      Scripts
    • Rotatable Blocks
  • Vanilla Re-Creations
    • Custom Crops
      Scripts
    • Custom Glass
    • Custom Glazed Terracotta
    • Custom Trapdoors
      Scripts
  • Documentation
    • Block Format History
    • Block Shapes
    • Block Sounds
    • Vanilla Block Models
Commands
  • General
    • Intro to Command Blocks
    • Functions
    • Block States
    • Coordinate System
    • NBT Commands
    • Scoreboard Operations
    • Understanding Selectors
  • Commands
    • Damage
    • Execute
    • Playanimation
    • Playsound
  • On Event Systems
    • On Player First Join
    • On Player Join
    • On Player Leave
    • On Player Death
    • On Player Respawn
    • On First World Load
  • Scoreboard Systems
    • Entity Counter
    • Scoreboard Timers
    • Comparing And Retrieving Scores
  • Techniques
    • Execute Logic Gates
    • MBE - Max's Block Entity
    • FMBE - A New Way to Create Display Entities
    • Look Detection
    • Movement Detections
    • Orbital Camera
  • Useful Creations
    • Custom Crafter
    • Multiplayer Position Rearrangement
      function
Concepts
  • contents.json
  • Emojis & Symbols
  • Molang
  • Namespaces
  • Overwriting Assets
  • Raw Text
  • Shaders
  • Sounds
  • Subpacks
  • Text and Localization
  • Texture Atlases
  • textures_list.json
Documentation
  • Shared Constructs
  • Advanced Molang
  • File Types
  • Fog IDs
  • Material Configuration Description
  • Menu Categories
  • Molang Queries
  • Pack Folder Structure
  • Sound Definitions
  • Vanilla Materials
Entities
  • General
    • Intro to Entities BP
      guide
    • Intro to Entities RP
      guide
    • Troubleshooting Entities
      help
    • Entity Events
    • Entity Properties
    • NPC Dialogues
    • Render Controllers
    • Spawn Rules
  • Tutorials
    • Convert Points Between Any Space (World, Entity, Bones)
    • Creating Boats
    • Detecting Other Entities
    • Disabling Team Damage
    • Dummy Entities
    • Entity Attacks
    • Entity Holds Item
    • Entity Movement
    • Entity Timers
    • Flying Entities
    • Introduction to AOE Clouds
    • Invulnerable Entities
    • Look at Entity
    • Sleeping Entities
    • Solid Entities
    • Spawning Tamed Entities
      Scripts
    • Village Mechanic
  • Documentation
    • Dummy Components
    • Non-Mob Runtime Identifiers
    • Projectiles
    • Runtime Identifiers
    • Vanilla Usage Components
    • Vanilla Usage Spawn Rules
Items
  • General
    • Intro to Items
      guide
    • Item Components
    • Item Tags
    • Item Events
      Scripts
    • Item Event Migration
      help
    • Troubleshooting Items
      help
  • Tutorials
    • Custom Armor
    • Custom Food
      Scripts
    • Custom Pottery Sherds
    • Custom Weapons
    • Equipment-Based Commands
    • High Resolution Items
    • Spawning Items
    • Throwable Items
  • Documentation
    • Enchantments
    • Attachables
    • Item Format History
    • Numerical Item IDs
    • Vanilla Item Identifiers
    • Vanilla Usage Components
JSON UI
  • General
    • Intro to JSON UI
      guide
    • Best Practices
      guide
  • Tutorials
    • Adding HUD Elements
    • Aseprite Animations
    • Buttons and Toggles
    • Modifying Server Forms
    • Preserve Title Texts
    • String to Number
  • Documentation
    • JSON UI Documentation
Loot, Recipes & Trading
  • General
    • Trading Behavior
  • Documentation
    • Loot Tables
    • Trade Tables
    • Recipes
    • Item Functions
  • Tutorials
    • Randomized Structure Loot
Meta
  • Add-On Performance
  • Style Guide
  • Useful Links
  • Using Schemas
  • Version Control
  • Q&A
    • Blocks and Items Q&A 2024/08/30
    • Deferred Technical Preview Q&A 2024/02/23
    • GameTest Q&A 2021/08/06
    • Scripting and Editor Q&A 2023/09/22
    • World Generation Q&A 2024/11/15
NBT
  • General
    • .mcstructure
  • Tutorials
    • Experiments in Education Edition
    • Extending Structure Limits
  • NBT in Depth
    • About NBT (Named Binary Tag)
    • NBT Libraries
    • Reading NBT Example
Particles
  • General
    • Intro to Particles
      guide
  • Tutorials
    • Disabling Particles
  • Documentation
    • Vanilla Particles
Scripting
  • General
    • Intro to Scripting
    • What is Script API?
    • API Modules
  • Tutorials
    • Block Placement Prevention
    • GameTests
    • Script Core Features
    • Script Forms
    • Script Requests API
    • Simple Chat Commands
  • Documentation
    • Engine Environment
    • Script Resources
    • Script Watchdog
    • Troubleshooting JavaScript
    • TypeScript
Servers
  • Software
    • Bedrock Server Software
  • Protocols
    • Bedrock Protocol
    • NetherNet Protocol
    • RakNet Protocol
Visuals
  • General
    • Introduction to Entity Visuals
      guide
    • Bedrock Modeling
    • Custom Death Animations
    • Effects in Animations
    • Material Creations
    • Materials
    • Math-Based Animations
    • Skin Packs
  • Tutorials
    • Entity Texture Animation
    • Glowing Entity Texture
    • Hurt Animations
    • Leash Position
    • Player Geometry
    • Remove Entity Shadows
    • Retexturing Spawn Eggs
  • Ideas
    • Structure Presentation
World Generation
  • General
    • Intro to World Generation
      guide
    • Biomes
      guide
    • Feature Types
  • Tutorials
    • Block Conditions for Features
    • Generating Custom Ores
    • Generating Custom Structures
    • Generating Patches
    • Heightmap Noise
  • Documentation
    • Biome Tags

Applying Constant Effects

easy
scripting
Applying Constant Effects
  • Detecting Treaders
    • Block JSON
    • Custom Component Script
  • Applying Effects to Treaders
    • Block JSON
    • Custom Component Script
  • Example JSON

FORMAT & MIN ENGINE VERSION 1.21.70

This tutorial assumes a basic understanding of blocks, including block states. Check out the blocks guide before starting.

This tutorial aims to show how to apply status effects to entities as long as these entities stand on the block.

Detecting Treaders ​

Block JSON ​

We will need to add a couple things to our code, first let's start with a state that will hold true when stood on, and false otherwise:

minecraft:block > description
json
"states": {
    "wiki:stood_on": [false, true]
}
1
2
3

Now we need to register our custom components to hook onto the stepOn and stepOff events:

minecraft:block > components
json
"minecraft:custom_components": [
    "wiki:treader_detection"
]
1
2
3

Custom Component Script ​

BP/scripts/treader_detection.js
js
import { BlockPermutation, GameMode, Player, world } from "@minecraft/server";

/** @type {import("@minecraft/server").BlockCustomComponent} */
const BlockTreaderDetectionComponent = {
    onStepOn({ entity, block }) {
        if (entity instanceof Player && entity.getGameMode() === GameMode.creative) return;

        block.setPermutation(
            BlockPermutation.resolve(block.typeId, {
                "wiki:stood_on": true,
            })
        );
    },
    onStepOff({ entity, block }) {
        if (entity instanceof Player && entity.getGameMode() === GameMode.creative) return;

        block.setPermutation(
            BlockPermutation.resolve(block.typeId, {
                "wiki:stood_on": false,
            })
        );
    },
};

world.beforeEvents.worldInitialize.subscribe(({ blockComponentRegistry }) => {
    blockComponentRegistry.registerCustomComponent(
        "wiki:treader_detection",
        BlockTreaderDetectionComponent
    );
});
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

Applying Effects to Treaders ​

Block JSON ​

We also need the block to tick in order to apply the desired effect every tick. For this, we'll use the permutations array so a custom component is only applied if the block is being stepped on:

minecraft:block
json
"permutations": [
    {
        "condition": "q.block_state('wiki:stood_on')",
        "components": {
            "minecraft:custom_components": ["wiki:treader_detection", "wiki:wither_treaders"],
            "minecraft:tick": {
                "interval_range": [1, 1],
                "looping": true
            }
        }
    }
]
1
2
3
4
5
6
7
8
9
10
11
12

Custom Component Script ​

Now, let's add our event that will give the entity the wither effect:

BP/scripts/wither_treaders.js
js
import { Entity, GameMode, Player, world } from "@minecraft/server";

/** @type {import("@minecraft/server").BlockCustomComponent} */
const BlockWitherTreadersComponent = {
    onTick(event) {
        const entities = event.dimension.getEntitiesAtBlockLocation(event.block.above().location);

        entities.forEach((entity) => {
            entity.addEffect("minecraft:wither", 2, { amplifier: 2 });
        });
    },
};

world.beforeEvents.worldInitialize.subscribe(({ blockComponentRegistry }) => {
    blockComponentRegistry.registerCustomComponent(
        "wiki:wither_treaders",
        BlockWitherTreadersComponent
    );
});
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

And done! The code above will trigger the desired status effect as long as the entity is standing on a block.

Example JSON ​

Example Wither Block
BP/blocks/wither_block.json
json
{
    "format_version": "1.21.70",
    "minecraft:block": {
        "description": {
            "identifier": "wiki:wither_block",
            "states": {
                "wiki:stood_on": [false, true]
            }
        },
        "components": {
            "minecraft:loot": "loot_tables/empty.json",
            "minecraft:map_color": "#181818",
            "minecraft:geometry": "geometry.wither_block",
            "minecraft:material_instances": {
                "*": {
                    "texture": "wiki:wither_block"
                }
            },
            "minecraft:custom_components": ["wiki:treader_detection"]
        },
        "permutations": [
            {
                "condition": "q.block_state('wiki:stood_on')",
                "components": {
                    "minecraft:custom_components": [
                        "wiki:treader_detection",
                        "wiki:wither_treaders"
                    ],
                    "minecraft:tick": {
                        "interval_range": [1, 1],
                        "looping": true
                    }
                }
            }
        ]
    }
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

Contributors

Edit Applying Constant Effects on GitHub

Text and image content on this page is licensed under the Creative Commons Attribution 4.0 International License

Code samples on this page are licensed under the MIT License

Bedrock Wiki by Bedrock OSS

"Minecraft" is a trademark of Mojang AB.

Bedrock OSS, Bedrock Wiki and bedrock.dev are not affiliated in any way with Microsoft or Mojang AB.

  • Privacy Policy
  • Join our Discord
  • Learn how to Contribute
  • Visit our Repository