Question

所以我尝试在我的页面上创建一个按钮，动画并滚动回到页面顶部。我创建了一个名为upArrow的类，并将其添加到应该触发jQuery函数的按钮中。然而，当我点击什么火没有，我不知道为什么。这是网站和我的代码：

https://jorgeg1105.github.io/JG-Photography/

＆＃13;

GRANT CREATE SESSION TO <<username>> WITH ADMIN OPTION

＆＃13;

//When the page loads, Fade in all divs with class hidden.
//Then Remove hidden class.
$(document).ready(function () {
    $('div.hidden').fadeIn(2000).removeClass('hidden');
});

//Fade In all h3 with class hidden.
//Remove hidden class.
$('h3.hidden').fadeIn(3000).removeClass('hidden');

//Image Filter
$(document).ready(function () {
	$("#mainnav ul li a").click(function (){
		var category = $(this).attr("class");

		if (category == "all" ){
			$("#imgcontainer img").addClass("hidden");
			setTimeout(function (){
				$("#imgcontainer img").removeClass("hidden");
			});
		}
		else {
			$("#imgcontainer img").addClass("hidden");
			setTimeout(function(){
				$("."+category).removeClass("hidden");
			});
		}
	});
});


//When burger is clicked. Mobile nav and mainnav are toggled.
$(".burger").on("click", function (){
	$("#mainnav").toggleClass("hidden");
	$(".mobilenav").toggleClass("hidden");
});

//When Arrow is clicked page scrolls to the top of the screen.
$('.upArrow').click(function(){
	$('html, body').animate({scrollTop : 0},800);
	return false;
});

＆＃13;

body {
	margin: 0;
	padding: 0;
  	display: flex;
  	height: 100vh;
  	overflow: hidden;
  	font-family: 'Raleway', sans-serif;
}

ul {
	list-style-type: none;
}

#container {
 flex: 1 0 0;
 overflow-y: auto;
}


/*------------------------Classes to be added to the current active link on a page----------*/
.active {
	color: #766E6B;
}


/*--------------Side Navigation Styles--------------------*/
#sidenav {
	background-color: black;
	color: white;
	width: 60px;
	text-align: center;
	border-right: 6px solid #766E6B;
  	overflow-y: auto;
}

#sidenav ul {
	display: flex;
	flex-direction: column;
	padding: 0;
	margin: 0;
  	justify-content: center;
}

#sidenav ul li:first-child {
  margin-bottom: auto;
}
#sidenav ul li:last-child {
  margin-top: auto;
  }

#sidenav a {
	padding: 20px;
	display: block;
}

#sidenav a:visited {
	color: white;
}

#sidenav a:hover {
	color: black;
	background-color: white;
}



/*-------------Header Styles-------------------------------*/
header {
	padding: 40px 30px;
	background-color: #F7F6F2;
}

header h1, h3 {
	font-family: 'Tangerine', cursive;
}

header h1 {
	font-size: 90px;
}

header h3 {
	font-size: 40px;
}

header a {
	text-decoration: none;
	color: black;
	padding: 0 0 12px 0;
	line-height: 1.5em;
}

header a:hover {
	transition: color 1s;
	color: #766E6B;
}


.smalltxt {
	font-size: 12px;
}

.topnavitems {
	padding: 20px;
	position: relative;
}

/*------------------Main Navigation-----------------------*/

#mainnav {
	display: flex;
	justify-content: center;
	background-color: black;
}


#mainnav li {
	margin-right: 5px;

}

#mainnav a {
	color: white;
	text-decoration: none;
	letter-spacing: 1px;
	padding: 10px;
}

#mainnav a:hover {
	font-size: 20px;
	color: grey;
}

/*--------------------ImgContainer Area------------------------*/

#imgcontainer {
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	padding: 30px 20px;
	justify-content: center;
	background-color: #F7F6F2;
}

#imgcontainer img {
	flex: 1;
	width: 40vh;
	padding: 10px;
}

#imgcontainer img:hover {
	border: 2px solid black;
}
/*-----------------------Footer Styles---------------------*/

footer {
	background-color: #F7F6F2;
	padding: 10px 20px;
	border-top: 1px solid grey;

}

footer ul {
	justify-content: center;
}

footer li {
	margin-right: 10px;
}

.developer {
	text-decoration: none;
	color: black;
}

/*-------------------Js Fade In class-------------------*/
.hidden {
	display: none !important;
}

/*-------------------Flexbox-----------------------*/
.col {
	flex: 1;
}

.row {
	display: flex;
}

/*----------------------Mobile Navigation------------------------*/

.mobilenav {
	background-color: black;
	justify-content: center;
	display: none;
}

.mobilenav ul {
	display: flex;
	flex-direction: row;
	margin: 0;
}

.mobilenav li {
	margin-right: 10px;

}

.mobilenav a {
	color: white;
	text-decoration: none;
	display: block;
	padding: 20px;
}

.mobilenav a:hover {
	background-color: grey;
}

.burger {
	background-color: black;
	width: 100%;
	text-align: right;
	display: none;
	cursor: pointer;
}

.burger i {
	color: white;
	padding: 5px;
	margin-right: 10px;
}

/*-----------------Mobile Footer------------------------------*/
.mobilefooter {
	display: none;
}

.mobilefooter a {
	color: black;
}

/*-----------Media Queries----------------------------*/

@media screen and (max-width: 1024px){
	#sidenav {
		display: none;
	}

	nav.mobilenav.row {

		display: none;
	}

	.mobilefooter {
		display: flex;
	}

}

@media screen and (max-width: 930px){
	#imgcontainer img {
		width: 80vh;
	}
}

@media screen and (max-width: 740px){
	header a {
		display: none;
	}

	.mobilenav {
		display: flex;
	}
}

@media screen and (max-width: 600px){

	header h1 {
		font-size: 70px;
	}

	header h3 {
		font-size: 40px;
	}

	#imgcontainer img {
		width: 95%;
	}

	#mainnav {
		display: block;
	}

	#mainnav ul {
		flex-direction: column;
		width: 100%;
		margin: 0;
		text-align: center;
		padding: 0;
	}

	#mainnav li {
		border-bottom: 1px solid grey;
		padding: 10px;
	}

	.mobilenav {
		display: block;
	}

	.mobilenav ul {
		flex-direction: column;
		width: 100%;
		margin: 0;
		text-align: center;
		padding: 0;

	}

	.mobilenav li {
		border-bottom: 1px solid grey;
	}

	.burger {
		display: block;
	}

}

＆＃13;

感谢您的帮助！

Answer 1

您需要禁用与向上箭头链接关联的eventDefault。 event.preventDefault（）方法停止发生元素的默认操作，在我们的例子中，这意味着它阻止链接跟随'＃'URL。

    $('#back-to-top').on('click', function (e) {
    e.preventDefault();
    $('html,body').animate({
        scrollTop: 0
    }, 700);

看看this小提琴我作为一个例子。

希望这可以提供帮助，劳拉。

jQuery滚动效果无法正常工作

1 个答案: