เริ่มศึกษา VueJS อะไร เป็นยังไง ทำหน้าที่อะไร จากโค้ดตัวอย่าง

npm run build

python3 -m http.server 8000

npm install -g serve

serve -s .

<script setup>
import HelloWorld from './components/HelloWorld.vue'
import TheWelcome from './components/TheWelcome.vue'
</script>

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

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

  <main>
    <TheWelcome />
  </main>
</template>

<style scoped>
header {
  line-height: 1.5;
}

.logo {
  display: block;
  margin: 0 auto 2rem;
}

@media (min-width: 1024px) {
  header {
    display: flex;
    place-items: center;
    padding-right: calc(var(--section-gap) / 2);
  }

  .logo {
    margin: 0 2rem 0 0;
  }

  header .wrapper {
    display: flex;
    place-items: flex-start;
    flex-wrap: wrap;
  }
}
</style>

<script setup>
defineProps({
  msg: {
    type: String,
    required: true
  }
})
</script>

<template>
  <div class="greetings">
    <h1 class="green">{{ msg }}</h1>
    <h3>
      You’ve successfully created a project with
      <a href="https://vitejs.dev/" target="_blank" rel="noopener">Vite</a> +
      <a href="https://vuejs.org/" target="_blank" rel="noopener">Vue 3</a>.
    </h3>
  </div>
</template>

<style scoped>
h1 {
  font-weight: 500;
  font-size: 2.6rem;
  position: relative;
  top: -10px;
}

h3 {
  font-size: 1.2rem;
}

.greetings h1,
.greetings h3 {
  text-align: center;
}

@media (min-width: 1024px) {
  .greetings h1,
  .greetings h3 {
    text-align: left;
  }
}
</style>

<script setup>
import WelcomeItem from './WelcomeItem.vue'
import DocumentationIcon from './icons/IconDocumentation.vue'
import ToolingIcon from './icons/IconTooling.vue'
import EcosystemIcon from './icons/IconEcosystem.vue'
import CommunityIcon from './icons/IconCommunity.vue'
import SupportIcon from './icons/IconSupport.vue'
</script>

<template>
  <WelcomeItem>
    <template #icon>
      <DocumentationIcon />
    </template>
    <template #heading>Documentation</template>

    Vue’s
    <a href="https://vuejs.org/" target="_blank" rel="noopener">official documentation</a>
    provides you with all information you need to get started.
  </WelcomeItem>

  <WelcomeItem>
    <template #icon>
      <ToolingIcon />
    </template>
    <template #heading>Tooling</template>

    This project is served and bundled with
    <a href="https://vitejs.dev/guide/features.html" target="_blank" rel="noopener">Vite</a>. The
    recommended IDE setup is
    <a href="https://code.visualstudio.com/" target="_blank" rel="noopener">VSCode</a> +
    <a href="https://github.com/johnsoncodehk/volar" target="_blank" rel="noopener">Volar</a>. If
    you need to test your components and web pages, check out
    <a href="https://www.cypress.io/" target="_blank" rel="noopener">Cypress</a> and
    <a href="https://on.cypress.io/component" target="_blank" rel="noopener"
      >Cypress Component Testing</a
    >.

    <br />

    More instructions are available in <code>README.md</code>.
  </WelcomeItem>

  <WelcomeItem>
    <template #icon>
      <EcosystemIcon />
    </template>
    <template #heading>Ecosystem</template>

    Get official tools and libraries for your project:
    <a href="https://pinia.vuejs.org/" target="_blank" rel="noopener">Pinia</a>,
    <a href="https://router.vuejs.org/" target="_blank" rel="noopener">Vue Router</a>,
    <a href="https://test-utils.vuejs.org/" target="_blank" rel="noopener">Vue Test Utils</a>, and
    <a href="https://github.com/vuejs/devtools" target="_blank" rel="noopener">Vue Dev Tools</a>. If
    you need more resources, we suggest paying
    <a href="https://github.com/vuejs/awesome-vue" target="_blank" rel="noopener">Awesome Vue</a>
    a visit.
  </WelcomeItem>

  <WelcomeItem>
    <template #icon>
      <CommunityIcon />
    </template>
    <template #heading>Community</template>

    Got stuck? Ask your question on
    <a href="https://chat.vuejs.org" target="_blank" rel="noopener">Vue Land</a>, our official
    Discord server, or
    <a href="https://stackoverflow.com/questions/tagged/vue.js" target="_blank" rel="noopener"
      >StackOverflow</a
    >. You should also subscribe to
    <a href="https://news.vuejs.org" target="_blank" rel="noopener">our mailing list</a> and follow
    the official
    <a href="https://twitter.com/vuejs" target="_blank" rel="noopener">@vuejs</a>
    twitter account for latest news in the Vue world.
  </WelcomeItem>

  <WelcomeItem>
    <template #icon>
      <SupportIcon />
    </template>
    <template #heading>Support Vue</template>

    As an independent project, Vue relies on community backing for its sustainability. You can help
    us by
    <a href="https://vuejs.org/sponsor/" target="_blank" rel="noopener">becoming a sponsor</a>.
  </WelcomeItem>
</template>

<template>
  <div class="item">
    <i>
      <slot name="icon"></slot>
    </i>
    <div class="details">
      <h3>
        <slot name="heading"></slot>
      </h3>
      <slot></slot>
    </div>
  </div>
</template>

<style scoped>
.item {
  margin-top: 2rem;
  display: flex;
  position: relative;
}

.details {
  flex: 1;
  margin-left: 1rem;
}

i {
  display: flex;
  place-items: center;
  place-content: center;
  width: 32px;
  height: 32px;

  color: var(--color-text);
}

h3 {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--color-heading);
}

@media (min-width: 1024px) {
  .item {
    margin-top: 0;
    padding: 0.4rem 0 1rem calc(var(--section-gap) / 2);
  }

  i {
    top: calc(50% - 25px);
    left: -26px;
    position: absolute;
    border: 1px solid var(--color-border);
    background: var(--color-background);
    border-radius: 8px;
    width: 50px;
    height: 50px;
  }

  .item:before {
    content: ' ';
    border-left: 1px solid var(--color-border);
    position: absolute;
    left: 0;
    bottom: calc(50% + 25px);
    height: calc(50% - 25px);
  }

  .item:after {
    content: ' ';
    border-left: 1px solid var(--color-border);
    position: absolute;
    left: 0;
    top: calc(50% + 25px);
    height: calc(50% - 25px);
  }

  .item:first-of-type:before {
    display: none;
  }

  .item:last-of-type:after {
    display: none;
  }
}
</style>

<template>
  <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="currentColor">
    <path
      d="M15 4a1 1 0 1 0 0 2V4zm0 11v-1a1 1 0 0 0-1 1h1zm0 4l-.707.707A1 1 0 0 0 16 19h-1zm-4-4l.707-.707A1 1 0 0 0 11 14v1zm-4.707-1.293a1 1 0 0 0-1.414 1.414l1.414-1.414zm-.707.707l-.707-.707.707.707zM9 11v-1a1 1 0 0 0-.707.293L9 11zm-4 0h1a1 1 0 0 0-1-1v1zm0 4H4a1 1 0 0 0 1.707.707L5 15zm10-9h2V4h-2v2zm2 0a1 1 0 0 1 1 1h2a3 3 0 0 0-3-3v2zm1 1v6h2V7h-2zm0 6a1 1 0 0 1-1 1v2a3 3 0 0 0 3-3h-2zm-1 1h-2v2h2v-2zm-3 1v4h2v-4h-2zm1.707 3.293l-4-4-1.414 1.414 4 4 1.414-1.414zM11 14H7v2h4v-2zm-4 0c-.276 0-.525-.111-.707-.293l-1.414 1.414C5.42 15.663 6.172 16 7 16v-2zm-.707 1.121l3.414-3.414-1.414-1.414-3.414 3.414 1.414 1.414zM9 12h4v-2H9v2zm4 0a3 3 0 0 0 3-3h-2a1 1 0 0 1-1 1v2zm3-3V3h-2v6h2zm0-6a3 3 0 0 0-3-3v2a1 1 0 0 1 1 1h2zm-3-3H3v2h10V0zM3 0a3 3 0 0 0-3 3h2a1 1 0 0 1 1-1V0zM0 3v6h2V3H0zm0 6a3 3 0 0 0 3 3v-2a1 1 0 0 1-1-1H0zm3 3h2v-2H3v2zm1-1v4h2v-4H4zm1.707 4.707l.586-.586-1.414-1.414-.586.586 1.414 1.414z"
    />
  </svg>
</template>