javascript - 使用 jQuery 滚动页面不起作用

Question

JavaScript 新手，尝试创建一个简单的程序，在单击导航项时滚动到 div。但是，它不起作用，我不明白为什么。

这是片段:

        $(document).ready(function() {
      alert("asda");
    
      setBindings();
    });
    
    function setBindings() {
      $("nav a").click(function(e) {
         // stops the a tags for working.. i.e. clicking to another page. Functions stops the functionality.
        var sectionID = e.currentTarget.id + "Section";
        alert('button id ' + sectionID);
    
        $("html body").animate({
          scrollTop: $("#" + sectionID).offset().top
        }, 1000)
        })
    
      })
    }

<nav class="clearfix">
			<div class="logo-container">
				<i><h2><b>DELIVERY MOTION</b></h2></i>

			</div>

			<ul class="clearfix">
				<li><a id="delivery" href="#">Delivery</a></li>
				<li><a  id="about" href="#">About Us</a></li>
				<li><a href="#">Services</a></li>
				<li><a href="#">FAQ</a></li>
				<li><a href="#">Contact</a></li>

				<li><a href="#">Login</a></li>

			</ul>



			<a href="#" id="pull">Menu</a>
		</nav>


    <div id="deliverySection">
		<h1> Order anything from anywhere in Karachi instantly at your doorstep. </h1><hr>
		<div id='fee-estimate-box'>
			<form id='fee-estimate-form' action="#">
					<legend id='delivery-text'>Delivery Fee Calculator</legend>
					<span>FROM </span> <input type="text" name="firstname" value="PICKUP ADDRESS">
					<span>TO </span> <input type="text" name="lastname" value="DROP ADDRESS">
					<span>ESTIMATED FEE </span> <input type="text" name="estimated-fee" value="0.00 PKR">
					<input class='btn-submit' type="submit" value="BOOK NOW!">
			</form>

		</div>
		<div id='silver-bar'>
			<img src='img/red-car.png' alt='fast deliver'>
		</div>
	</div>
	<div id="aboutSection">
		<h2> How it works </h2>
		<div class="container">
		  <div class="row">
		    <div class="col-sm-2" id="infobox">
					<img src='img/map-icon.png' width="50px" height="50px">
					<h3> Search </h3>
					<h4>Select pickup address </h4>
		    </div>
		    <div class="col-sm-2">
					<br><br>
					<img src='img/arrow-up.png' width="50px" height="50px" class='arrows-img'>
		    </div>
		    <div class="col-sm-2"  id="infobox">
					<img src='img/delivery-icon.png' width="50px" height="50px" class="order-icon-img">
					<h3> Order</h3>
					<h4>Make a booking online </h4>
		    </div>
				<div class="col-sm-2">
					<br>
					<img src='img/arrow-down.png' width="50px" height="50px" class='arrows-img'>
		    </div>
				<div class="col-sm-2"  id="infobox">
					<img src='img/truck-icon.png' width="50px" height="50px">
					<h3> Delivered</h3>
					<h4>Instant courier delivery</h4>
				</div>
		  </div>
		</div>
	</div>

起初我以为问题出在我的 jquery 上，但是它工作正常。 javascript 的链接也是正确的。我尝试重新检查动画功能，但无法找出问题所在。有什么想法吗？

Answer 1

$("html body") 必须替换为 $("html,body") 才能触发滚动。您的 JavaScript 中也有一个错误，最后还有一个“})”。现在好了。检查您的控制台是否有此类错误，或使用片段，如您的问题所示。

$(document).ready(function() {
    //  alert("asda");
    
        setBindings();
    });
    
    function setBindings() {
        $("nav a").click(function(e) {
  
        var sectionID = e.currentTarget.id + "Section";
       // alert('button id ' + sectionID+ $("#" + sectionID).offset().top);
    
        $("html,body").animate({
          scrollTop: $("#" + sectionID).offset().top
        }, 1000);
        })
    
      }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<nav class="clearfix">
			<div class="logo-container">
				<i><h2><b>DELIVERY MOTION</b></h2></i>

			</div>

			<ul class="clearfix">
				<li><a id="delivery" href="javascript:;">Delivery</a></li>
				<li><a  id="about" href="javascript:;">About Us</a></li>
				<li><a href="javascript:;">Services</a></li>
				<li><a href="javascript:;">FAQ</a></li>
				<li><a href="javascript:;">Contact</a></li>

				<li><a href="javascript:;/">Login</a></li>

			</ul>



			<a href="#" id="pull">Menu</a>
		</nav>


    <div id="deliverySection">
		<h1> Order anything from anywhere in Karachi instantly at your doorstep. </h1><hr>
		<div id='fee-estimate-box'>
			<form id='fee-estimate-form' action="#">
					<legend id='delivery-text'>Delivery Fee Calculator</legend>
					<span>FROM </span> <input type="text" name="firstname" value="PICKUP ADDRESS">
					<span>TO </span> <input type="text" name="lastname" value="DROP ADDRESS">
					<span>ESTIMATED FEE </span> <input type="text" name="estimated-fee" value="0.00 PKR">
					<input class='btn-submit' type="submit" value="BOOK NOW!">
			</form>

		</div>
		<div id='silver-bar'>
			<img src='img/red-car.png' alt='fast deliver'>
		</div>
	</div>
	<div id="aboutSection">
		<h2> How it works </h2>
		<div class="container">
		  <div class="row">
		    <div class="col-sm-2" id="infobox">
					<img src='img/map-icon.png' width="50px" height="50px">
					<h3> Search </h3>
					<h4>Select pickup address </h4>
		    </div>
		    <div class="col-sm-2">
					<br><br>
					<img src='img/arrow-up.png' width="50px" height="50px" class='arrows-img'>
		    </div>
		    <div class="col-sm-2"  id="infobox">
					<img src='img/delivery-icon.png' width="50px" height="50px" class="order-icon-img">
					<h3> Order</h3>
					<h4>Make a booking online </h4>
		    </div>
				<div class="col-sm-2">
					<br>
					<img src='img/arrow-down.png' width="50px" height="50px" class='arrows-img'>
		    </div>
				<div class="col-sm-2"  id="infobox">
					<img src='img/truck-icon.png' width="50px" height="50px">
					<h3> Delivered</h3>
					<h4>Instant courier delivery</h4>
				</div>
		  </div>
		</div>
	</div>