vue v-model number输入数字

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
  </head>

  <body>
    <div >
      <p>{{ message }}</p>
      <!-- 只能输入数字 -->
      <input type="number" name=""  />
    </div>

    <script>
      const app = new Vue({
        el: '#app',
        data: {
          message: 'Hello Vue.js!',
        },
      })
    </script>
  </body>
</html>

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