App.vue

<template>
  <header>
    <img
      alt="Vue logo"
      class="logo"
      src="@/assets/logo.svg"
      width="125"
      height="125"
    />

    <div class="wrapper">
      <HelloWorld msg="You did it!" />

      <nav>
        <RouterLink to="/">Home</RouterLink>
        <RouterLink to="/counter" data-testId="Counter">Counter</RouterLink>
        <RouterLink to="/todo">Todo</RouterLink>
      </nav>
    </div>
  </header>

  <RouterView />
</template>