使用js原生實現年份輪播選擇效果實例
用js實現一個年份輪換選擇效果。廢話不多說，看圖：
1. html
代碼如下：
<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <title>Title</title> <link rel='stylesheet' href='http://www.cgvv.com.cn/bcjs/index.css' rel='external nofollow' type='text/css'/> <script type='text/javascript' src='http://www.cgvv.com.cn/bcjs/echarts.min.js'></script> <script type='text/javascript' src='http://www.cgvv.com.cn/bcjs/index.js'></script></head><body><div class='container'> <div onclick='clickBefore()' unselectable='on' onselectstart='return false;'> <span><</span> </div> <div class='wrap'> <span onclick='selected(this)'>1</span> <span onclick='selected(this)'>2</span> <span onclick='selected(this)'>3</span> <span onclick='selected(this)'>4</span> <span onclick='selected(this)'>5</span> </div> <div onclick='clickNext()' unselectable='on' onselectstart='return false;'> <span>></span> </div></div><div id='content'></div></body></html>
2.js
代碼如下：
window.onload = function () { //首次渲染列表 initList(firstIndex);};let yearArr = [2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021];yearArr.reverse();//起始索引let firstIndex = 0;//選中索引,默認選中第一個let selectedIndex = 0;/** * 初始化列表 */function initList(firstIndex) { //渲染頁面span列表 let spanList = document.getElementById(’wrap’).getElementsByTagName(’span’); for (let i = 0; i < spanList.length; i++) { let index = firstIndex + i; let span = spanList[i]; span.innerText = yearArr[index]; //選中樣式添加和移除 if (index === selectedIndex) { span.classList.add(’active’); } else { span.classList.remove(’active’) } } //頁面內容顯示值 document.getElementById(’content’).innerText = ’當前選中年份：’ + yearArr[selectedIndex];}/** * 下一頁 */function clickNext(div) { if (firstIndex + 5 < yearArr.length) { firstIndex = firstIndex + 1; initList(firstIndex) } arrowActive();}/** 上一頁 */function clickBefore(div) { if (firstIndex > 0) { firstIndex = firstIndex - 1; initList(firstIndex) } arrowActive();}/** * 選中 */function selected(span) { let value = span.innerText; let index = yearArr.findIndex((el) => { return el + '' === value; }) selectedIndex = index !== -1 ? index : 0; initList(firstIndex);}/** * 左右箭頭激活 * firstIndex = 0: 右激活 左不 * firstIndex = length-5：左激活 右不 * 其他：全激活 */function arrowActive() { let left = document.getElementById(’left’) let right = document.getElementById(’right’) left.classList.add(’arrow_active’); right.classList.add(’arrow_active’); if (firstIndex === 0) { left.classList.remove(’arrow_active’); } else if (firstIndex === yearArr.length - 5) { right.classList.remove(’arrow_active’); }}
2.css
代碼如下：
body{ margin-top: 80px;}.container { display: flex; justify-content: center; align-items: center; margin: 10px;}.wrap { height: 40px; z-index: 1; color: black; display: flex; flex: 1; background: rgba(155,226,219,0.5); border-radius: 20px; margin-left: 20px; margin-right: 20px;}.wrap span { flex: 1; text-align: center; height: 40px; line-height: 40px; border-radius: 20px;}.active{ background: #1abc9c; color:#fff;}.arrow_left { left: 10px; color: green; padding: 0px 14px; border-radius: 50%; font-size: 30px; z-index: 2;}.arrow_right { right: 10px; color: green; padding: 0px 14px; border-radius: 50%; font-size: 30px; z-index: 2;}.arrow_active{ color: blue;}.content{ margin-left: 30px;}總結
每天記錄一點，從小小菜鳥變小菜鳥！！！
到此這篇關于使用js原生實現年份輪播選擇效果的文章就介紹到這了,更多相關js原生實現年份輪播選擇內容請搜索好吧啦網以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持好吧啦網！
相關文章：
網公網安備