本文實例講解了4種JavaScript實現(xiàn)簡單tab選項卡切換的方法，分享給大家供大家參考，具體內(nèi)容如下
效果圖：
方法一：for循環(huán)+if判斷當(dāng)前點擊與自定義數(shù)組是否匹配
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>tab切換</title> <style type="text/css"> button { width:120px; height: 32px; line-height: 32px; background-color: #ccc; font-size: 24px; } div { display: none; width:200px; height: 200px; font-size: 72px; color:#ddd; background-color: green; border:1px solid black; } </style></head><body> <button style="background-color: yellow;">1</button> <button>2</button> <button>3</button> <button>4</button> <div style="display:block;">1</div> <div>2</div> <div>3</div> <div>4</div> <script type="text/javascript"> //定義數(shù)組并獲取數(shù)組內(nèi)各個的節(jié)點 var buttonArr = document.getElementsByTagName("button"); var divArr = document.getElementsByTagName("div"); for(var i = 0; i < buttonArr.length;i++) { buttonArr[i].onclick = function() { //this // alert(this.innerHTML) //for循環(huán)遍歷button數(shù)組長度 for(var j = 0; j < buttonArr.length; j++) { //重置所有的button樣式 buttonArr[j].style.backgroundColor = "#ccc"; //給當(dāng)前的(點擊的那個)那個button添加樣式 this.style.backgroundColor = "yellow"; //隱藏所有的div divArr[j].style.display = "none"; //判斷當(dāng)前點擊是按鈕數(shù)組中的哪一個？ if(this == buttonArr[j]) { // alert(j); //顯示點擊按鈕對應(yīng)的div divArr[j].style.display = "block"; } } } } </script></body></html>方法二：自定義index為當(dāng)前點擊
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>tab切換</title> <style type="text/css"> button { width:120px; height: 32px; line-height: 32px; background-color: #ccc; font-size: 24px; } div { display: none; width:200px; height: 200px; font-size: 72px; color:#ddd; background-color: green; border:1px solid black; } </style></head><body> <button style="background-color: yellow;">1</button> <button>2</button> <button>3</button> <button>4</button> <div style="display:block;">1</div> <div>2</div> <div>3</div> <div>4</div> <script type="text/javascript"> var buttonArr = document.getElementsByTagName("button"); var divArr = document.getElementsByTagName("div"); for(var i = 0; i < buttonArr.length;i++) { buttonArr[i].index = i; // buttonArr[i].setAttribute("index",i); buttonArr[i].onclick = function() { for(var j = 0; j < buttonArr.length; j++) { buttonArr[j].style.backgroundColor = "#ccc"; buttonArr[this.index].style.backgroundColor = "yellow"; divArr[j].style.display = "none"; divArr[this.index].style.display = "block"; } } } </script></body></html>方法三：className
<!doctype html><html lang="en"><head> <meta charset="UTF-8"> <title>tab</title> <style type="text/css"> * {padding:0; margin:0;} button { background-color: #ccc; width:80px; height: 30px; } .btn-active { background-color: yellow; font-weight:bold; font-size: 14px; } div{ width:200px; height: 200px; font-size: 64px; background-color: #0c0; display: none; color:#fff; } .div-active { display: block; } </style></head><body> <button class="btn-active">按鈕1</button> <button>按鈕2</button> <button>按鈕3</button> <button>按鈕4</button> <div class="div-active">1</div> <div>2</div> <div>3</div> <div>4</div> <script type="text/javascript"> //1.先獲取元素 var buttonList = document.getElementsByTagName("button"); var divList = document.getElementsByTagName("div"); //2.添加事件 for(var i = 0; i < buttonList.length; i++) { buttonList[i].index = i; buttonList[i].onclick = function() { for(var j = 0; j < buttonList.length;j++) { buttonList[j].className = ""; divList[j].className = ""; } this.className = "btn-active"; divList[this.index].className = "div-active"; } } </script></body></html>方法四：className+匿名函數(shù)的自執(zhí)行
<!doctype html><html lang="en"><head> <meta charset="UTF-8"> <title>tab</title> <style type="text/css"> * {padding:0; margin:0;} button { background-color: #ccc; width:80px; height: 30px; } .btn-active { background-color: yellow; font-weight:bold; font-size: 14px; } div{ width:200px; height: 200px; font-size: 64px; background-color: #0c0; display: none; color:#fff; } .div-active { display: block; } </style></head><body> <button class="btn-active">按鈕1</button> <button>按鈕2</button> <button>按鈕3</button> <button>按鈕4</button> <div class="div-active">1</div> <div>2</div> <div>3</div> <div>4</div> <script type="text/javascript"> //1.先獲取元素 var buttonList = document.getElementsByTagName("button"); var divList = document.getElementsByTagName("div"); //2.添加事件 for(var i = 0; i < buttonList.length; i++) { (function(i){ //匿名函數(shù)自執(zhí)行 buttonList[i].onclick = function() { for(var j = 0; j < buttonList.length;j++) { buttonList[j].className = ""; divList[j].className = ""; } this.className = "btn-active"; divList[i].className = "div-active"; } })(i) } </script></body></html>如果大家還想深入學(xué)習(xí)，可以點擊兩個精彩的專題：javascript選項卡操作方法匯總 jquery選項卡操作方法匯總
希望本文所述對大家學(xué)習(xí)javascript程序設(shè)計有所幫助。
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