vue/key-modifiers/index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Key modifiers</title>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/modern-normalize/0.5.0/modern-normalize.min.css">
</head>
<body>
  <style>
    form {
      margin-bottom: 1rem;
    }
    #root > div {
      border: 1px solid #aff;
      padding: 1rem;
    }
  </style>
  <div id="root">
    <form @keyup="handleKeyup">
      <div>
        <label for="inp">Press <code>ESC</code> or <code>w</code> key</label>
        <input type="text" id="inp" >
      </div>
    </form>
    <form @keyup="handleBody">
      <div>
        <label for="inp2">Press <code>any</code> key</label>
        <input type="text" id="inp2" ref="inputElement">
      </div>
    </form>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
  <script>
    new Vue({
      el: '#root',
      methods: {
        handleKeyup(event) {
          console.log(event);
          if(event.keyCode === 27 || event.keyCode === 87) { // ESC
            console.log('YEP');
          } else {
            console.log('NOPE');
          }
        },
        handleBody(event) {
          if(event.code === "Space") {
            this.$refs.inputElement.parentElement.insertAdjacentHTML('beforeend', `<b style="display: block;">You pressed key:</b> ${event.code}`);
          } else {
            this.$refs.inputElement.parentElement.insertAdjacentHTML('beforeend', `<b style="display: block;">You pressed key:</b> ${event.key}`);
          }
        }
      }
    })
  </script>
</body>
</html>