原生JavaScript寫出Tabs標簽頁的實例代碼
最近在重新學習JavaScript，手寫了一個tabs標簽頁。
話不多說，直接開始。
首先，是前端頁面。
圖1 tabs
先來把tabs分解一下：
圖2 tabs分解
首先，一個大的框div，上面紅色的框是導航欄nav，導航欄里是一個無序列表ul，里面三個li標簽（黃色的框），li標簽里兩個綠色標簽是兩個span，一個用來放導航的名字，一個用來放導航關閉的icon，右邊是一個button，用來添加新的導航欄及內容；下方是導航欄的內容section。
導航tabs.html代碼如下：
<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <meta name='viewport' content='width=device-width, initial-scale=1.0'> <title>Document</title></head><body> <main> <div id='tab'> <!-- tab標簽 --> <nav class='firstnav'><ul> <li class='liactive'><span>測試1</span><span class='icon-guanbi'>X</span></li> <li><span>測試2</span><span class='icon-guanbi'>X</span></li> <li><span>測試3</span><span class=' icon-guanbi'>X</span></li></ul><div class='tabadd'> <span>+</span></div> </nav> <!-- tab內容 --> <div class='tabscon'><section class='conactive'>測試內容1</section><section>測試內容2</section><section>測試內容3</section> </div> </div> </main> <script src='http://m.b3g6.com/bcjs/js/tabs.js'></script></body></html><style> * { margin: 0; padding: 0;}ul li { list-style: none;}main { width: 960px; height: 500px; border-radius: 10px; margin: 50px auto;}main h4 { height: 100px; line-height: 100px; text-align: center;}.tabsbox { width: 900px; margin: 0 auto; height: 400px; border: 1px solid lightsalmon; position: relative;}nav ul { overflow: hidden;}nav ul li { float: left; width: 100px; height: 50px; line-height: 50px; text-align: center; border-right: 1px solid #ccc; position: relative;}nav ul li.liactive { border-bottom: 2px solid #fff; z-index: 9;}#tab input { width: 80%; height: 60%;}nav ul li span:last-child { position: absolute; user-select: none; font-size: 12px; top: -18px; right: 0; display: inline-block; height: 20px;}.tabadd { position: absolute; /* width: 100px; */ top: 0; right: 0;}.tabadd span { display: block; width: 20px; height: 20px; line-height: 20px; text-align: center; border: 1px solid #ccc; float: right; margin: 10px; user-select: none;}.tabscon { width: 100%; height: 300px; position: absolute; padding: 30px; top: 50px; left: 0px; box-sizing: border-box; border-top: 1px solid #ccc;}.tabscon section,.tabscon section.conactive { display: none; width: 100%; height: 100%;}.tabscon section.conactive { display: block;}</style>
由于給導航欄增刪查改的js代碼很多，我單獨用一個js文件寫tabs.js，在tabs.html里引用就行。
實現的導航欄功能有：
1）導航欄的切換功能
2）增加導航欄的功能
3）刪除導航欄的功能
tabs.js代碼如下：
var that;class Tab { constructor(id){ that = this; //獲取元素 this.main = document.querySelector(id); this.add = this.main.querySelector(’.tabadd’); //li的父元素 this.ul = this.main.querySelector(’.firstnav ul:first-child’); //section的父元素 this.fsection = this.main.querySelector(’.tabscon’); this.init(); } //初始化操作 init(){ this.updateNode(); this.add.onclick = this.addTab; for(let i = 0;i<this.lis.length;i++){ this.lis[i].index = i; this.lis[i].onclick = this.toggleTab; this.remove[i].onclick = this.removeTab; this.spans[i].ondblclick = this.editTab; this.sections[i].ondblclick = this.editTab; } } //獲取li跟section updateNode(){ this.lis = this.main.querySelectorAll(’li’); this.sections = this.main.querySelectorAll(’section’); this.remove = this.main.querySelectorAll(’.icon-guanbi’); this.spans = this.main.querySelectorAll(’.firstnav li span:first-child’) } //1.切換功能 toggleTab(){ that.clearClass(); this.className = ’liactive’; that.sections[this.index].className = ’conactive’; } clearClass(){ for(let i = 0;i<this.lis.length;i++){ this.lis[i].className = ’’; this.sections[i].className = ’’; } } //2.添加功能 addTab(){ that.clearClass(); //1)添加li元素和section var random = Math.random() var li = ’<li class='liactive'><span>新選項卡</span><span class='iconfont icon-guanbi'>X</span></li>’; var section = ’<section class='conactive'>’+random+’</section>’; //2）把兩個元素添加到對應的父級元素中 that.ul.insertAdjacentHTML(’beforeend’,li); that.fsection.insertAdjacentHTML(’beforeend’,section); that.init(); } //3.刪除功能 removeTab(e){ e.stopPropagation(); var index = this.parentNode.index; console.log(index); //刪除對應節點 that.lis[index].remove(); that.sections[index].remove(); //刪除后及時更新頁面中的節點 that.init(); //如果當前頁面有選中狀態，就不用執行下面的步驟 if(document.querySelector(’.liactive’)) return; //讓index前一個處于選中狀態 index--; that.lis[index] && that.lis[index].click(); } //4.修改功能 editTab(){ let str = this.innerHTML; // console.log(str); //禁止雙擊選中文字 window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty(); this.innerHTML=’<input type='text'>’ let input = this.children[0]; input.value = str; input.select(); //input失去焦點后變回span input.onblur = function(){ this.parentNode.innerHTML= this.value; } //按回車也能 input.onkeyup = function(e){ if(e.keyCode == 13){ this.blur();//獲得焦點 } } }} new Tab(’#tab’);// tab.init();
到此這篇關于原生JavaScript寫出Tabs標簽頁的文章就介紹到這了,更多相關js tabs 標簽頁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