minecraft-assets/data/minecraft/recipes/spruce_fence.json

{
  "type": "minecraft:crafting_shaped",
  "group": "wooden_fence",
  "pattern": [
    "W#W",
    "W#W"
  ],
  "key": {
    "#": {
      "item": "minecraft:stick"
    },
    "W": {
      "item": "minecraft:spruce_planks"
    }
  },
  "result": {
    "item": "minecraft:spruce_fence",
    "count": 3
  }
}