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About the implementation of Vue comment framework (implementation of parent component)

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Jun 29, 2018 pm 03:47 PM

vue

This article mainly introduces the implementation of the simple Vue comment framework (implementation of the parent component). The content is quite good. I will share it with you now and give it as a reference.

I recently saw a requirement:

Implement a comment function, requiring the comment list to be displayed in pages
Correspondingly Module implementation is componentized
Can display the publisher, publishing time and content

It is not difficult at first glance, but in the specific implementation Still encountered some problems. In addition, because it is my first time to use vue, I am confused when I read the documentation. Without further ado, let’s analyze how each module is implemented.

Source code address

Comment form code:

<!-- 文档结构区开始 -->
<template>
  <p id="comment" >
    <Userp @transferUser="getInput" ></Userp>
    <Commentp :List="List"></Commentp>
    <Pagep @transferUser="getPage" :totalCount="totalCount" :currentPage="currentPage"></Pagep>
  </p>
</template>
<!-- 文档结构区结束 -->

<!-- js 控制区开始 -->
<script>
//引入组件 commentInput、commentList、pagination
import Userp from &#39;./commentInput.vue&#39;
import Pagep from &#39;./pagination.vue&#39;
import Commentp from &#39;./commentList.vue&#39;

export default {
  //声明组件名
  name: &#39;comment&#39;,

  //包含实例可用组件的哈希表
  components: {
    Userp,
    Pagep,
    Commentp
  },

  //声明组件参数
  data() {
    return {
      totalCount: 0,
      currentPage: 1,
      pagesize: 3,
      totalData: [],
      List: [],
    }
  },

  methods: {
    //显示评论列表信息的方法
    getInput(msg) {
      //将评论信息保存到评论数组里
      this.totalData.push({ text: msg })
      //计算评论信息总条数长度
      this.totalCount = this.totalData.length

      //判断评论总数是否大于单页显示条数
      if (this.totalCount <= this.pagesize) {
       // 显示所有评论
       this.List = this.totalData
      } else {
       // 截取totalData中 this.totalCount - this.pagesize 后面的元素进行显示
       this.List = this.totalData.slice(this.totalCount - this.pagesize)
      }
      //点击评论按钮，默认跳转显示第一页内容
      this.currentPage = 1
      //评论列表倒序显示，即最新评论，显示在最上面
      this.List.reverse()

    },

    // 计算评论列表每一页的显示内容
    getPage(curr, size) {
      this.currentPage = curr

      if (this.totalCount <= this.pagesize) {
        //显示所有评论
        this.List = this.totalData
      } else {
        var start = this.totalCount - this.currentPage * this.pagesize
        if (start < 0) { start = 0 }
        // 截取totalData中 [start, start + this.pagesize] 位元素进行显示
        this.List = this.totalData.slice(start, start + this.pagesize)
      }
      //评论列表倒序显示，即最新评论，显示在最上面
      this.List.reverse()
    }
  },
}
</script>
<!-- js 控制区结束 -->

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