最简单纯JavaScript实现Tab标签页切换的方式(推荐)
内容摘要
先说一下最土的一种方法:
Html:
<div class="tab-head">
<h2 id="tab1" onmouseover="changeTab1()" class="selected">1</h2>
<h2 id="tab2" onmouseover="changeTab2
Html:
<div class="tab-head">
<h2 id="tab1" onmouseover="changeTab1()" class="selected">1</h2>
<h2 id="tab2" onmouseover="changeTab2
文章正文
先说一下最土的一种方法:
Html:
1 2 3 4 5 6 7 8 9 10 | <div class = "tab-head" > <h2 id= "tab1" onmouseover= "changeTab1()" class = "selected" >1</h2> <h2 id= "tab2" onmouseover= "changeTab2()" >2</h2> <h2 id= "tab3" onmouseover= "changeTab3()" >3</h2> </div> <div class = "tab-content" > <div id= "c1" class = "show" >content1</div> <div id= "c2" >content2</div> <div id= "c3" >content3</div> </div> |
CSS:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | h2 { border-top: solid cornflowerblue 1px; border-left: solid cornflowerblue 1px; width: 50px; height: 25px; margin: 0; float: left; text-align: center; } .tab-content { border: solid cornflowerblue 1px; width: 152px; height: 100px; } .tab-content div{ display: none; } .selected { background-color: cornflowerblue; } .tab-content .show{ display: block; } |
JS:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | var tab1 = document.getElementById( 'tab1' ), tab2 = document.getElementById( 'tab2' ), tab3 = document.getElementById( 'tab3' ), c1 = document.getElementById( 'c1' ), c2 = document.getElementById( 'c2' ), c3 = document.getElementById( 'c3' ); function changeTab1() { tab1.className = 'selected' ; tab2.className = '' ; tab3.className = '' ; c1.className = 'show' c2.className = '' ; c3.className = '' ; } function changeTab2() { tab1.className = '' ; tab2.className = 'selected' ; tab3.className = '' ; c1.className = '' ; c2.className = 'show' ; c3.className = '' ; } function changeTab3() { tab1.className = '' ; tab2.className = '' ; tab3.className = 'selected' ; c1.className = '' c2.className = '' ; c3.className = 'show' ; } |
效果:
实现Tab的切换,我们很容易想到的一种方式就是给每一个要控制的标签添加id,然后分别编写鼠标事件,使用id获取每个元素,精确地控制每个元素的样式。
这种方式的缺点显而易见,有几个元素就有几个id,每个tab都要编写function,里面的方法大同小异。要增加tab的话,还要增加id和function,代码冗余,不易扩展。
第二种较为高明些的方法是编写一个function,将每个元素的序号传进去。
Html:
1 2 3 4 5 6 7 8 9 10 | <div class = "tab-head" > <h2 onmouseover= "changeTab(0)" class = "selected" >1</h2> <h2 onmouseover= "changeTab(1)" >2</h2> <h2 onmouseover= "changeTab(2)" >3</h2> </div> <div class = "tab-content" > <div class = "show" >content1</div> <div>content2</div> <div>content3</div> </div> |
JS:
1 2 3 4 5 6 7 8 9 10 11 | var tabs = document.getElementsByClassName( 'tab-head' )[0].getElementsByTagName( 'h2' ), contents = document.getElementsByClassName( 'tab-content' )[0].getElementsByTagName( 'div' ); function changeTab(index) { for ( var i = 0, len = tabs.length; i < len; i++) { if (i === index) { tabs[i].className = 'selected' ; contents[i].className = 'show' ; } else { tabs[i].className = '' ; contents[i].className = '' ; } } } |
这样就只要写一个function了,而且不需要id,但是还是要按照顺序传递参数。
第三种方式和第二种基本一样,只是参数传递的是this指针。
Html:
1 2 3 4 5 6 7 8 9 10 | <div class = "tab-head" > <h2 onmouseover= "changeTab(this)" class = "selected" >1</h2> <h2 onmouseover= "changeTab(this)" >2</h2> <h2 onmouseover= "changeTab(this)" >3</h2> </div> <div class = "tab-content" > <div class = "show" >content1</div> <div>content2</div> <div>content3</div> </div> |
JS:
1 2 3 4 5 6 7 8 9 10 11 12 13 | var tabs = document.getElementsByClassName( 'tab-head' )[0].getElementsByTagName( 'h2' ), contents = document.getElementsByClassName( 'tab-content' )[0].getElementsByTagName( 'div' ); function changeTab(tab) { for ( var i = 0, len = tabs.length; i < len; i++) { if (tabs[i] === tab) { tabs[i].className = 'selected' ; contents[i].className = 'show' ; } else { tabs[i].className = '' ; contents[i].className = '' ; } } } |
这种方式稍微方便一些,只要传递this指针,不用按照顺序传递序号,但这也不是最简便的方式。
最简便的一种:
第四种方式:
Html:
1 2 3 4 5 6 7 8 9 10 | <div class = "tab-head" > <h2 class = "selected" >1</h2> <h2>2</h2> <h2>3</h2> </div> <div class = "tab-content" > <div class = "show" >content1</div> <div>content2</div> <div>content3</div> </div> |
JS:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | var tabs = document.getElementsByClassName( 'tab-head' )[0].getElementsByTagName( 'h2' ), contents = document.getElementsByClassName( 'tab-content' )[0].getElementsByTagName( 'div' ); ( function changeTab(tab) { for ( var i = 0, len = tabs.length; i < len; i++) { tabs[i].onmouseover = showTab; } })(); function showTab() { for ( var i = 0, len = tabs.length; i < len; i++) { if (tabs[i] === this) { tabs[i].className = 'selected' ; contents[i].className = 'show' ; } else { tabs[i].className = '' ; contents[i].className = '' ; } } } |
这样JS、Html、CSS就完全分离了,通过this指针就可以判断当前鼠标滑过的是哪一个tab了。
以上所述是小编给大家介绍的最简单纯JavaScript实现Tab标签页切换的方式(推荐),希望对大家有所帮助,如果大家有任何疑问请留言,小编会及时回复大家的,在此也非常感谢大家对phpstudy网站的支持!
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