When I Run the client, and put the items in the correct order in the crafting table, nothing comes out at all! Here is my json file:

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    " A ",
    "ASA",
    " A "
  ],
  "key": {
    "S": {
      "item": "minecraft:bone"
    },
    "A": [
      {
        "item": "minecraft:cooked_beef"
      },
    ]
  },
  "result": {
    "item": "im:pet_treat"
  }
}

im:pet_treat is an item id in the game. I tested this with other items and blocks and even changed the result but it still didn't work. Can anyone help?

Your recipe json has syntax errors. Specifically these lines:

7 minutes ago, cherrylime said:

"A":
[
    {
        "item": "minecraft:cooked_beef"
    },
]

As an advice - install any kind of json syntax plugin in your IDE. It will then tell you if your json has syntax errors.

Alternatively you can check your json files through a json validator like jsonlint.

Here is my new code. It still does not work. Do I have to do anything to register the crafting recipe?

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    " A ",
    "ASA",
    " A "
  ],
  "key": {
    "S": {
      "item": "minecraft:bone"
    },
    "A": [
      {
        "item": "minecraft:cooked_beef"
      },
    ]
  },
  "result": {
    "item": "im:pet_treat",
    "data": 0
  }
}

I changed the code to this to make the JSON valid, but it still is not working in the game.

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    " A ",
    "ASA",
    " A "
  ],
  "key": {
    "S": {
      "item": "minecraft:bone"
    },
    "A": {
        "item": "minecraft:cooked_beef"
   },
  "result": {
    "item": "im:pet_treat",
    "data": 0
  }
  }
}

Your result object is specified as one of the keys. It needs to be it's own object with no parent.

I'm sorry, I don't know much about modding. How do I do that?

By changing the structure of your json. Currently your result property is one of the properties specified in the key object. It however must be on the same level as the type property(have no parent). Pull it up one level. See this page on the minecraft wiki for the json structure.

I have changed my code to this:

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    " A ",
    "ASA",
    " A "
  ],
  "key": {
    "S": {
      "item": "minecraft:bone"
    },
    "A": {
        "item": "minecraft:cooked_beef"
   }
    }
       "result": {
    "item": "im:pet_treat",
    "data": 0
  }
}

 

However no result shows up. Do I need to register this crafting recipe on a different class or interface?

Your json now contains syntax errors. It's missing a comma just before the result property.

Thank you so much! It works now!