custom crafting example mod on 1.12

examplemods/diamondBlockCustomCraft_112.js

@@ -0,0 +1,43 @@
+(function AddDiamondRecipe() {
+    ModAPI.meta.title("DiamondCraftingRecipeMod 1.12");
+    ModAPI.meta.description("Adds a crafting recipe to create diamond blocks from dirt.");
+
+    async function registerRecipe(isServer) {
+        if (isServer) {
+            await new Promise((res, rej) => {
+                ModAPI.addEventListener("bootstrap", res);
+            });
+        }
+        const parseJson = ModAPI.reflect.getClassByName("JSONObject").constructors.findLast(x => x.length === 1);
+        const CraftingManager = ModAPI.reflect.getClassByName("CraftingManager");
+        const CraftingManagerMethods = CraftingManager.staticMethods;
+        const jsonData = parseJson(ModAPI.util.str(`{
+            "type": "crafting_shaped", ${/*/or crafting_shapeless/*/""}
+            "pattern": [
+    "I I",
+    " i ",
+    "iii"
+  ],
+  "key": {
+    "I": {
+      "item": "minecraft:dirt",
+      data: 0 ${/*/data param optional!!!/*/""}
+    },
+    "i": {
+      "item": "minecraft:grass",
+      data: 0 ${/*/data param optional!!!/*/""}
+    }
+  },
+  "result": {
+    "item": "minecraft:diamond",
+    "data": 0,
+    "count": 4
+  }
+            }`.trim()));
+        const recipeObj = CraftingManagerMethods.func_193376_a.method(jsonData); //convert json to an IRecipe
+        CraftingManagerMethods.func_193379_a.method(ModAPI.util.str("coolrecipeid"), recipeObj); //register recipe under resource location
+    }
+
+    ModAPI.dedicatedServer.appendCode(registerRecipe);
+    registerRecipe(false);
+})();