How do I use the `If` `then` `else` condition in json schema?

Question

A relatively new addition to JSON Schema (draft-07) adds the if, then and else keywords. I cannot work out how to use these new key words correctly. Here is my JSON Schema s

Answer 1

Can't you just use the "else" property ?

{
    "type": "object",
    "properties": {
        "foo": { "type": "string" },
        "bar": { "type": "string" }
     },
     "if": {
        "properties": {
            "foo": { 
              "enum": ["bar"] 
            }
        }
    },
    "then": { 
      "required": ["bar"]
    },
    "else": {
      "required": [] 
    }
}