How to use JavaScript to implement table paging function?
Oct 20, 2023 pm 06:19 PM
How to use JavaScript to implement table paging function?
With the development of the Internet, more and more websites use tables to display data. In some cases where the amount of data is large, the data needs to be displayed in pages to improve user experience. This article will introduce how to use JavaScript to implement table paging function and provide specific code examples.
1. HTML structure
First, we need to prepare an HTML structure to host tables and paging buttons. We can use the <table> tag to create a table, and the <div> tag as a container for paging buttons. The specific code is as follows:
<table id="myTable">
<thead>
<tr>
<th>列名1</th>
<th>列名2</th>
<th>列名3</th>
</tr>
</thead>
<tbody>
<!-- 表格數(shù)據(jù) -->
</tbody>
</table>
<div id="pagination">
<!-- 分頁(yè)按鈕 -->
</div>2. JavaScript implementation
Next, we use JavaScript to implement the table paging function. First, we need to define some variables:
var table = document.getElementById("myTable"); // 表格
var tbody = table.getElementsByTagName("tbody")[0]; // 表格的 tbody 元素
var rowsPerPage = 10; // 每頁(yè)顯示的行數(shù)
var currentPage = 0; // 當(dāng)前頁(yè)碼
var totalPages = Math.ceil(tbody.rows.length / rowsPerPage); // 總頁(yè)數(shù)
var pagination = document.getElementById("pagination"); // 分頁(yè)按鈕的容器Then, we create a function to display the data of the specified page number:
function displayPage(page) {
// 清空表格
while (tbody.firstChild) {
tbody.removeChild(tbody.firstChild);
}
// 計(jì)算起始行和結(jié)束行的索引
var startIndex = page * rowsPerPage;
var endIndex = Math.min(startIndex + rowsPerPage, tbody.rows.length);
// 將指定頁(yè)碼的數(shù)據(jù)添加到表格中
for (var i = startIndex; i < endIndex; i++) {
tbody.appendChild(tbody.rows[i].cloneNode(true));
}
}Next, we create a function to generate paging buttons:
function createPagination() {
// 清空分頁(yè)按鈕
while (pagination.firstChild) {
pagination.removeChild(pagination.firstChild);
}
// 添加上一頁(yè)按鈕
var previousButton = document.createElement("button");
previousButton.innerText = "上一頁(yè)";
previousButton.onclick = function() {
currentPage = Math.max(currentPage - 1, 0);
displayPage(currentPage);
};
pagination.appendChild(previousButton);
// 添加頁(yè)碼按鈕
for (var i = 0; i < totalPages; i++) {
var pageButton = document.createElement("button");
pageButton.innerText = i + 1;
pageButton.onclick = function() {
currentPage = parseInt(this.innerText) - 1;
displayPage(currentPage);
};
pagination.appendChild(pageButton);
}
// 添加下一頁(yè)按鈕
var nextButton = document.createElement("button");
nextButton.innerText = "下一頁(yè)";
nextButton.onclick = function() {
currentPage = Math.min(currentPage + 1, totalPages - 1);
displayPage(currentPage);
};
pagination.appendChild(nextButton);
}Finally, we call the displayPage function and the createPagination function to display the initial page number data and generate the paging button:
displayPage(currentPage); createPagination();
3. Complete code example
var table = document.getElementById("myTable");
var tbody = table.getElementsByTagName("tbody")[0];
var rowsPerPage = 10;
var currentPage = 0;
var totalPages = Math.ceil(tbody.rows.length / rowsPerPage);
var pagination = document.getElementById("pagination");
function displayPage(page) {
while (tbody.firstChild) {
tbody.removeChild(tbody.firstChild);
}
var startIndex = page * rowsPerPage;
var endIndex = Math.min(startIndex + rowsPerPage, tbody.rows.length);
for (var i = startIndex; i < endIndex; i++) {
tbody.appendChild(tbody.rows[i].cloneNode(true));
}
}
function createPagination() {
while (pagination.firstChild) {
pagination.removeChild(pagination.firstChild);
}
var previousButton = document.createElement("button");
previousButton.innerText = "上一頁(yè)";
previousButton.onclick = function() {
currentPage = Math.max(currentPage - 1, 0);
displayPage(currentPage);
};
pagination.appendChild(previousButton);
for (var i = 0; i < totalPages; i++) {
var pageButton = document.createElement("button");
pageButton.innerText = i + 1;
pageButton.onclick = function() {
currentPage = parseInt(this.innerText) - 1;
displayPage(currentPage);
};
pagination.appendChild(pageButton);
}
var nextButton = document.createElement("button");
nextButton.innerText = "下一頁(yè)";
nextButton.onclick = function() {
currentPage = Math.min(currentPage + 1, totalPages - 1);
displayPage(currentPage);
};
pagination.appendChild(nextButton);
}
displayPage(currentPage);
createPagination();4. Summary
Through the above JavaScript code, we can realize the table paging function. First, we need to prepare the HTML structure containing the table and pagination buttons. Then, we use JavaScript to control the display of data for a specified page number and generate paging buttons. Finally, call related functions to display the data of the initial page number and generate paging buttons. The code examples provided in this article can help you understand how to use JavaScript to implement table paging function, and can be modified and customized according to your own needs. Hope this article is helpful to you!
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