IMoO/behavior_pack/recipes/imoo_chair.json

{
    "format_version": "1.12",
    "minecraft:recipe_shaped": {
      "description": {
        "identifier": "imoo:chair"
      },
      "tags": [
        "crafting_table"
      ],
      "pattern": [
        "###",
        "###",
        "| |"
      ],
      "key": {
        "#": {
            "item": "minecraft:wooden_slab"
        },
        "|": {
            "item": "minecraft:stick"
        }
      },
      "result": {
        "item": "imoo:chair"
      }
    }
  }