for key json code example

Example 1: get all keys in json object

var obj = {name: "Jeeva", age: "22", gender: "Male"}
console.log(Object.keys(obj))

Example 2: key value json javascript

var jsonArray = '{"required":1, "minlength":2}'
var jsonParsedArray = JSON.parse(jsonArray);
for (key in jsonParsedArray) {
  if (jsonParsedArray.hasOwnProperty(key)) {
      console.log("%c "+key + " = " + jsonParsedArray[key],"color:cyan");
  }
}