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我正在創建我的導航下拉菜單。它正在工作。但是,每當單擊下拉菜單時,我都會收到以下錯誤消息。bootstrap nav dropdown this.hash undefined
TypeError: $(...).offset(...) is undefined
$('html, body').animate({ scrollTop: $(this.hash).offset().top - 5 }, 1000);
這是我的html。
<div class="main-nav">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="index.html">
<h1>
<img class="img-responsive" src="images/logo.png" alt="logo"></h1>
</a>
</div>
<div class="collapse navbar-collapse" id="navbar-collapse">
<ul class="nav navbar-nav navbar-right">
<li class="scroll active"><a href="#home">Home</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Service<span class="caret"></span></a>
<ul class="dropdown-menu" role="menu">
<li><a href="#services">Asset Management</a></li>
<li class="divider" role="separator"></li>
<li><a href="/Service">Asset Management</a></li>
<li><a href="/Service">Consulting</a></li>
<li><a href="/Service">Due Diligence</a></li>
<li><a href="/Service">HOA Account Management</a></li>
<li><a href="/Service">Loan Services</a></li>
<li><a href="/Service">Property Maintenance and Inspections</a></li>
<li><a href="/Service">Property Management</a></li>
<li><a href="/Service">Real Estate Brokerage</a></li>
<li><a href="/Service">Tax Account Management</a></li>
<li><a href="/Service">Utility Account Management</a></li>
</ul>
</li>
<li class="scroll"><a href="#about-us">About Us</a></li>
<li class="scroll"><a href="#contact">Contact</a></li>
</ul>
</div>
</div>
</div>
而在我的main.js中,我有處理打開和關閉的代碼。
$('.navbar-collapse ul li a').on('click', function() {
$('html, body').animate({ scrollTop: $(this.hash).offset().top - 5 }, 1000);
return false;
});
我想弄清楚爲什麼它給這個錯誤,我很難過。