<template>
  <div>
    <ul>
      <li v-for="item in paginatedData" :key="item.id">{{ item.name }}</li>
    </ul>
    <button @click="prevPage" :disabled="currentPage === 1">上一頁</button>
    <button @click="nextPage" :disabled="currentPage === totalPages">下一頁</button>
    <p>當(dāng)前第 {{ currentPage }} 頁，共 {{ totalPages }} 頁</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [],   // 數(shù)據(jù)列表
      currentPage: 1,
      pageSize: 10
    };
  },
  computed: {
    totalPages() {
      return Math.ceil(this.items.length / this.pageSize);
    },
    paginatedData() {
      const start = (this.currentPage - 1) * this.pageSize;
      return this.items.slice(start, start + this.pageSize);
    }
  },
  methods: {
    prevPage() {
      if (this.currentPage > 1) this.currentPage--;
    },
    nextPage() {
      if (this.currentPage < this.totalPages) this.currentPage++;
    }
  }
};
</script>

<template>
  <div>
    <button @click="goToPage(1)" :disabled="currentPage === 1">首頁</button>
    <button @click="prevPage" :disabled="currentPage === 1">上一頁</button>
    <span>第 {{ currentPage }} 頁 / 共 {{ totalPages }} 頁</span>
    <button @click="nextPage" :disabled="currentPage === totalPages">下一頁</button>
    <button @click="goToPage(totalPages)" :disabled="currentPage === totalPages">尾頁</button>
    <input v-model.number="goToInput" @keyup.enter="jumpToPage" placeholder="跳轉(zhuǎn)到頁數(shù)">
  </div>
</template>

<script>
export default {
  props: ['totalPages'],
  data() {
    return {
      currentPage: 1,
      goToInput: ''
    };
  },
  methods: {
    prevPage() {
      if (this.currentPage > 1) {
        this.currentPage--;
        this.$emit('page-changed', this.currentPage);
      }
    },
    nextPage() {
      if (this.currentPage < this.totalPages) {
        this.currentPage++;
        this.$emit('page-changed', this.currentPage);
      }
    },
    goToPage(page) {
      this.currentPage = page;
      this.$emit('page-changed', this.currentPage);
    },
    jumpToPage() {
      if (this.goToInput > 0 && this.goToInput <= this.totalPages) {
        this.currentPage = this.goToInput;
        this.$emit('page-changed', this.currentPage);
      }
      this.goToInput = ''; // 清空輸入框
    }
  }
};
</script>