用JavaScript實現一個代碼簡潔、邏輯不復雜的多級樹

2019-11-20 15:11:59

字體：大中小

來源：轉載

供稿：網友

在網上找個很多的樹實現，總感覺不盡如意，不是需要引用JS外部文件使用插件，就是代碼過多讓人看的眼花，實際上我只是想實現一個代碼簡潔、邏輯不復雜的樹，費話不多說直接上代碼：

1，首先寫CSS樣式，這個必需要寫的頭部最先渲染

 
<style> 
.ps{margin-left:10px;display:none;} 

.f { 
background: url("add.gif") no-repeat scroll -4px -21px; 
cursor: pointer; 
height: 35px; 
line-height: 37px; 
padding-left: 20px; 
} 
</style> 

2，在頁面主體中添加樹的具體內容，此內容也可以動態展示（動態展示只要針對規則就很好實現了，這就不用說了吧偷笑）

復制代碼代碼如下:

 
<div class="f" id="sgc1">密碼修改</div> 
<div class="f" id="sgc2">商品選擇</div> 
<div class="f" id="sgc3" onclick="w('gc3')">分類設置</div> 
<div class="ps" id="gc3" style="display:none"> 
<div id="sfgc91" class="f" onclick="k('fgc91')">Must See</div> 
<div class="ps" id="fgc91"> 
<div class="f">設置MustSee商品</div> 
</div> 
<div id="sfgc93" class="f" onclick="k('fgc93')">Spotlight</div> 
<div class="ps" id="fgc93"> 
<div class="f">設置Spotlight商品</div> 
</div> 
<div id="sfgc94" class="f" onclick="k('fgc94')">Daily Specials</div> 
<div class="ps" id="fgc94"> 
<div class="f">設置DailySpecials商品</div> 
</div> 
<div id="sfgc95" class="f" onclick="k('fgc95')">HotCategory</div> 
<div class="ps" id="fgc95"> 
<div class="f">設置HotCategory分類</div> 
<div class="f">設置HotCategory商品</div> 
</div> 
<div id="sfgc96" class="f" onclick="k('fgc96')">Hot & Cool Picks</div> 
<div class="ps" id="fgc96"> 
<div class="f">設置Hot & Cool Picks商品</div> 
</div> 
<div id="sfgc97" class="f" onclick="k('fgc97')">FeaturedCategorie</div> 
<div class="ps" id="fgc97"> 
<div class="f">設置FeaturedCategorie分類</div> 
<div class="f">設置FeaturedCategorie商品</div> 
</div> 
<div id="sfgc98" class="f" onclick="k('fgc98')">You Might Also Like…</div> 
<div class="ps" id="fgc98"> 
<div class="f">設置You Might Also Like…分類</div> 
<div class="f">設置You Might Also Like…商品</div> 
</div> 
</div> 
<div class="f" id="sgc4" onclick="w('gc4')">系統設置</div> 
<div class="ps" id="gc4" style="display:none"> 
<div class="f">用戶管理</div> 
</div> 

3，重頭戲來了，同鞋注意了，接下來實現JS的樹形控制

復制代碼代碼如下:

 
function w(vd) { 
var ob = document.getElementById(vd); 
if (ob.style.display == "block" || ob.style.display == "") { 
ob.style.display = "none"; 
var ob2 = document.getElementById('s' + vd); 
ob2.style.background = "url(add.gif) -4px -21px no-repeat"; 
} 
else { 
ob.style.display = "block"; 
var ob2 = document.getElementById('s' + vd); 
ob2.style.background = "url(add.gif) -4px 4px no-repeat;"; 
} 
} 
function k(vd) { 
var ob = document.getElementById(vd); 
if (ob.style.display == "block") { 
ob.style.display = "none"; 
var ob2 = document.getElementById('s' + vd); 
ob2.style.background = "url(add.gif) -4px -21px no-repeat"; 
} 
else { 
ob.style.display = "block"; 
var ob2 = document.getElementById('s' + vd); 
ob2.style.background = "url(add.gif) -4px 4px no-repeat;"; 
} 
} 