[рони]

skwz,

{
  let classNamesRE = /^(?:start|stop|status)$/;
  let input = document.getElementById("my-field");
  let div = document.querySelector(".sos");

  let onInputHandler = event => {
    let match = (event.code === "Enter" && event.target.value.match(classNamesRE))||"error";
    event.target.className = div.className = "sos " + match;
  };

  input.addEventListener("keyup", onInputHandler);
};