Vue front-end uses slice method to implement the pager

Preface

In Vue front-end development, implementing paging function is one of the common needs. Using JavaScript's slice() method, you can easily implement the functions of the pager, providing a user-friendly interface and a smooth pagination experience. This article will introduce in detail how to use the slice() method to implement the pager to help you realize efficient paging functions in Vue projects.

1. What is a pager?

A pager is a common user interface component for pagination browsing in a collection of big data. It usually contains elements such as page number button, previous page button, next page button and jump input box. Users can quickly switch and browse data of different page numbers through the pager.

2. Basic ideas for implementing pager using slice() method

In Vue, we can use JavaScript's slice() method to slice the data set to implement the paging function. The basic ideas are as follows:
Defining a data set: First, we need to define a data set, that is, an array of data to be displayed on pages.

Set the current page number and the number of displays per page: By defining the current page number and the number of displays per page, we can determine the range of data to be displayed.

Use slice() method to slice: According to the current page number and the number of displays per page, use slice() method to slice the data set to obtain the data corresponding to the current page number.

Update page display: bind the sliced ​​data to the page to display the page.

Implement the interaction of the pager: through elements such as page number button, previous page button and next page button, users can switch and browse between different page numbers.

3. Sample code implementation pager

<template>
  <div>
    <ul>
      <li v-for="item in paginatedData" :key="">{{  }}</li>
    </ul>
    <div class="pagination">
      <button @click="previousPage">Previous page</button>
      <button v-for="page in totalPages" :key="page" @click="goToPage(page)">{{ page }}</button>
      <button @click="nextPage">Next page</button>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      data: [], // Data collection      currentPage: 1, // Current page number      pageSize: 10, // Number of displayed per page    };
  },
  computed: {
    paginatedData() {
      const startIndex = ( - 1) * ;
      const endIndex = startIndex + ;
      return (startIndex, endIndex);
    },
    totalPages() {
      return ( / );
    },
  },
  methods: {
    previousPage() {
      if ( > 1) {
        --;
      }
    },
    nextPage() {
      if ( < ) {
        ++;
      }
    },
    goToPage(page) {
       = page;
    },
  },
};
</script>

The above code demonstrates a simple pager component. Through the slice() method, we slice the data set based on the current page number and the number of displays per page, and then bind the sliced ​​data to the page for display. At the same time, we have also implemented the functions of the previous page and next page buttons, as well as the function of clicking the page number button to jump to the corresponding page number.

Summarize

Using Vue and JavaScript's slice() method, we can easily implement the functions of the front-end pager and provide a smooth paging browsing experience. By defining the data set, setting the current page number and display quantity per page, and combining slice operations and page updates, we can achieve efficient paging functions.

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