<input type="text" id="prompt">
<div id="output"></div>

const array = []
const prompt = document.getElementById("prompt")

const showData = () => {
  document.getElementById("output").innerText = [...array];
}

prompt.addEventListener("keyup", (event) => {
  if(event.keyCode === 13 && prompt.value !== ""){
    array.push(prompt.value);
    prompt.value = ""
    showData(); 
  }
})