vue3 demo

<script setup>
import { computed, ref } from "vue";

// const blog = ref({
//   title: "Vue3 基础教程",
//   content: "Vue3 在 Vue2 的基础上做了很多优化",
//   link: "https://www.vue3js.cn/docs/zh/guide/introduction.html",
// });

const blogs = ref([
  {
    id: 1,
    title: "Vue3 基础教程",
    content: "Vue3 在 Vue2 的基础上做了很多优化",
    link: "https://www.vue3js.cn/docs/zh/guide/introduction.html",
  },
  {
    id: 2,
    title: "React 基础教程",
    content: "React 18 在 React 17 的基础上做了很多优化",
    link: "https://react.docschina.org/",
  },
  {
    id: 3,
    title: "Angular 基础教程",
    content: "Angular 12 在 Angular 11 的基础上做了很多优化",
    link: "https://angular.cn/docs",
  },
  {
    id: 4,
    title: "Node 基础教程",
    content: "Node 14 在 Node 13 的基础上做了很多优化",
    link: "https://nodejs.org/zh-cn/docs/",
  },
]);

const total = computed(() => blogs.value.length);

const showTotal = ref(true);

const toggleTotal = () => {
  showTotal.value = !showTotal.value;
};

const ininialBlogForm = {
  title: "",
  content: "",
  link: "",
};

const blogForm = ref({ ...ininialBlogForm });


function addPost(){
  if (!blogForm.value.title || !blogForm.value.content || !blogForm.value.link) {
    alert("请填写完整的博客信息");
    return;
  };
  blogs.value.push({
    id: blogs.value.length + 1,
    ...blogForm.value,
  });
  blogForm.value = { ...ininialBlogForm };
}
</script>

<template>
  <div class="box" v-for="blog in blogs" :key="blog.id">
    <h1>
      <a :href="blog.link" target="_blank">{{ blog.title }}</a>
    </h1>
    <article>
      <div>
        {{ blog.content.slice(0, 100) }}
      </div>
      <footer v-if="blog.content.length > 100">
        <button>阅读全文</button>
      </footer>
    </article>
  </div>
  <h3 v-show="showTotal">总共{{ total }}篇文章</h3>
  <button @click="toggleTotal">{{ showTotal ? "隐藏" : "显示" }}总数</button>
  <form @submit.prevent="addPost">
    <label for="blogTitle">博客标题</label>
    <input type="text" id="blogTitle" v-model="blogForm.title" />
    <label for="content">内容</label>
    <textarea name="" id="content" cols="30" rows="10" v-model="blogForm.content"></textarea>
    <label for="link">链接</label>
    <input type="text" id="link" v-model="blogForm.link" />
    <button type="submit">提交</button>
  </form>
</template>

<style scoped>
h1 {
  color: red;
}
form {
  display: grid;
  margin-top: 2em;
}
form button {
  background-color: black;
  color: white;
}
</style>