我正在尝试使用我的部分背景来阻止我的部分内容缩放。背景的规模是完美的，但它似乎也使内容规模，我使用gsap库我尝试在部分内创建一个容器，并给它绝对，但我没有做什么阻止内部缩放
//First the variables our app is going to use need to be declared
//References to DOM elements
var $window = $(window);
var $document = $(document);
//Only links that starts with #
var $navButtons = $("nav a").filter("[href^=#]");
var $navGoPrev = $(".go-prev");
var $navGoNext = $(".go-next");
var $sectionsContainer = $(".sections-container");
var $sections = $(".section");
var $currentSection = $sections.first();
//Animating flag - is our app animating
var isAnimating = false;
//The height of the window
var pageHeight = $window.innerHeight();
//Key codes for up and down arrows on keyboard. We'll be using this to navigate change sections using the keyboard
var keyCodes = {
UP : 38,
DOWN: 40
}
//Going to the first section
goToSection($currentSection);
/*
* Adding event listeners
* */
$window.on("resize", onResize).resize();
$window.on("mousewheel DOMMouseScroll", onMouseWheel);
$document.on("keydown", onKeyDown);
$navButtons.on("click", onNavButtonClick);
$navGoPrev.on("click", goToPrevSection);
$navGoNext.on("click", goToNextSection);
/*
* Internal functions
* */
/*
* When a button is clicked - first get the button href, and then section to the container, if there's such a container
* */
function onNavButtonClick(event)
{
//The clicked button
var $button = $(this);
//The section the button points to
var $section = $($button.attr("href"));
//If the section exists, we go to it
if($section.length)
{
goToSection($section);
event.preventDefault();
}
}
/*
* Getting the pressed key. Only if it's up or down arrow, we go to prev or next section and prevent default behaviour
* This way, if there's text input, the user is still able to fill it
* */
function onKeyDown(event)
{
var PRESSED_KEY = event.keyCode;
if(PRESSED_KEY == keyCodes.UP)
{
goToPrevSection();
event.preventDefault();
}
else if(PRESSED_KEY == keyCodes.DOWN)
{
goToNextSection();
event.preventDefault();
}
}
/*
* When user scrolls with the mouse, we have to change sections
* */
function onMouseWheel(event)
{
//Normalize event wheel delta
var delta = event.originalEvent.wheelDelta / 30 || -event.originalEvent.detail;
//If the user scrolled up, it goes to previous section, otherwise - to next section
if(delta < -1)
{
goToNextSection();
}
else if(delta > 1)
{
goToPrevSection();
}
event.preventDefault();
}
/*
* If there's a previous section, section to it
* */
function goToPrevSection()
{
if($currentSection.prev().length)
{
goToSection($currentSection.prev());
}
}
/*
* If there's a next section, section to it
* */
function goToNextSection()
{
if($currentSection.next().length)
{
goToSection($currentSection.next());
}
}
/*
* Actual transition between sections
* */
function goToSection($section)
{
//If the sections are not changing and there's such a section
if(!isAnimating && $section.length)
{
//setting animating flag to true
isAnimating = true;
//Sliding to current section
TweenLite.set($currentSection, {autoAlpha: 0, display: 'none'});
$currentSection = $section;
TweenLite.set($currentSection, {display: 'block'});
TweenLite.fromTo($currentSection, 0.6, {scale: 0.9, autoAlpha: 0}, {scale: 1, autoAlpha: 1, ease: Power1.easeOut, onComplete: onSectionChangeEnd, onCompleteScope: this});
//Animating menu items
TweenLite.to($navButtons.filter(".active"), 0.5, {className: "-=active"});
TweenLite.to($navButtons.filter("[href=#" + $currentSection.attr("id") + "]"), 0.5, {className: "+=active"});
}
}
/*
* Once the sliding is finished, we need to restore "isAnimating" flag.
* You can also do other things in this function, such as changing page title
* */
function onSectionChangeEnd()
{
isAnimating = false;
}
/*
* When user resize it's browser we need to know the new height, so we can properly align the current section
* */
function onResize(event)
{
//This will give us the new height of the window
var newPageHeight = $window.innerHeight();
/*
* If the new height is different from the old height ( the browser is resized vertically ), the sections are resized
* */
if(pageHeight !== newPageHeight)
{
pageHeight = newPageHeight;
//This can be done via CSS only, but fails into some old browsers, so I prefer to set height via JS
TweenLite.set([$sectionsContainer, $sections], {height: pageHeight + "px"});
//The current section should be always on the top
TweenLite.set($sectionsContainer, {scrollTo: {y: pageHeight * $currentSection.index() }});
}
}body, div, p {
margin: 0;
padding: 0;
}
body {
font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
font-weight: 300;
letter-spacing: 0.0625em;
background-color: #000;
}
h1{
color: #fff;
}
.sections-container {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: hidden;
z-index: 10;
}
.section {
position: absolute;
width: 100%;
height: 100%;
overflow: hidden;
display: none;
visibility: hidden;
opacity: 0;
}
#section-1 {
display: block;
visibility: visible;
opacity: 1;
}
.section .centered h1 {
text-align: center;
}
.section .centered p {
text-align: center;
}
#section-1 {
background-color: #5A4748;
}
#section-2 {
background-color: #45959b;
}
#section-3 {
background-color: #778899;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/latest/TweenLite.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/latest/plugins/CSSPlugin.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/latest/plugins/ScrollToPlugin.min.js"></script>
<div class="sections-container">
<div class="section" id="section-1">
<div class="centered">
<h1>1</h1>
</div>
</div>
<div class="section" id="section-2">
<div class="centered">
<h1>2</h1>
</div>
</div>
<div class="section" id="section-3">
<div class="centered">
<h1>3</h1>
</div>
</div>
</div>
答案 0 :(得分：1)
这会是你想要的吗？我基本上添加了一个背景div
<div id="background"></div>
#background {
position: absolute;
width: 100%;
height: 100%;
overflow: hidden;
display: block;
visibility: visible;
opacity: 1;
}
根据当前可见的部分分配背景类。
var $background = $("#background");
...
$background.classList = "";
TweenLite.set($background, {
className: '+=bg-' + ($sections.index($currentSection) + 1)
});
TweenLite.fromTo($background, 0.6, {
scale: 0.9,
autoAlpha: 0
}, {
scale: 1,
autoAlpha: 1,
ease: Power1.easeOut,
onComplete: onSectionChangeEnd,
onCompleteScope: this
});
如果您愿意，可以选择删除部分编号上的autoAlpha补间。
//First the variables our app is going to use need to be declared
//References to DOM elements
var $window = $(window);
var $document = $(document);
//Only links that starts with #
var $navButtons = $("nav a").filter("[href^=#]");
var $navGoPrev = $(".go-prev");
var $navGoNext = $(".go-next");
var $sectionsContainer = $(".sections-container");
var $sections = $(".section");
var $background = $("#background");
var $currentSection = $sections.first();
//Animating flag - is our app animating
var isAnimating = false;
//The height of the window
var pageHeight = $window.innerHeight();
//Key codes for up and down arrows on keyboard. We'll be using this to navigate change sections using the keyboard
var keyCodes = {
UP: 38,
DOWN: 40
}
//Going to the first section
goToSection($currentSection);
/*
* Adding event listeners
* */
$window.on("resize", onResize).resize();
$window.on("mousewheel DOMMouseScroll", onMouseWheel);
$document.on("keydown", onKeyDown);
$navButtons.on("click", onNavButtonClick);
$navGoPrev.on("click", goToPrevSection);
$navGoNext.on("click", goToNextSection);
/*
* Internal functions
* */
/*
* When a button is clicked - first get the button href, and then section to the container, if there's such a container
* */
function onNavButtonClick(event) {
//The clicked button
var $button = $(this);
//The section the button points to
var $section = $($button.attr("href"));
//If the section exists, we go to it
if ($section.length) {
goToSection($section);
event.preventDefault();
}
}
/*
* Getting the pressed key. Only if it's up or down arrow, we go to prev or next section and prevent default behaviour
* This way, if there's text input, the user is still able to fill it
* */
function onKeyDown(event) {
var PRESSED_KEY = event.keyCode;
if (PRESSED_KEY == keyCodes.UP) {
goToPrevSection();
event.preventDefault();
} else if (PRESSED_KEY == keyCodes.DOWN) {
goToNextSection();
event.preventDefault();
}
}
/*
* When user scrolls with the mouse, we have to change sections
* */
function onMouseWheel(event) {
//Normalize event wheel delta
var delta = event.originalEvent.wheelDelta / 30 || -event.originalEvent.detail;
//If the user scrolled up, it goes to previous section, otherwise - to next section
if (delta < -1) {
goToNextSection();
} else if (delta > 1) {
goToPrevSection();
}
event.preventDefault();
}
/*
* If there's a previous section, section to it
* */
function goToPrevSection() {
console.log($currentSection.prev().length > 0);
if ($currentSection.prev().length) {
goToSection($currentSection.prev());
}
}
/*
* If there's a next section, section to it
* */
function goToNextSection() {
if ($currentSection.next().length > 0) {
goToSection($currentSection.next());
}
}
/*
* Actual transition between sections
* */
function goToSection($section) {
//If the sections are not changing and there's such a section
if (!isAnimating && $section.length) {
//setting animating flag to true
isAnimating = true;
//Sliding to current section
TweenLite.set($currentSection, {
autoAlpha: 0,
display: 'none'
});
$currentSection = $section;
$background.classList = "";
TweenLite.set($currentSection, {
display: 'block'
});
TweenLite.set($background, {
className: 'bg-' + ($sections.index($currentSection) + 1)
});
//console.log($sections.index($currentSection) + 1);
TweenLite.fromTo($background, 0.6, {
scale: 0.9,
autoAlpha: 0
}, {
scale: 1,
autoAlpha: 1,
ease: Power1.easeOut,
onComplete: onSectionChangeEnd,
onCompleteScope: this
});
TweenLite.fromTo($currentSection, 0.6, {
autoAlpha: 0
}, {
autoAlpha: 1,
ease: Power1.easeOut,
});
//Animating menu items
TweenLite.to($navButtons.filter(".active"), 0.5, {
className: "-=active"
});
TweenLite.to($navButtons.filter("[href=#" + $currentSection.attr("id") + "]"), 0.5, {
className: "+=active"
});
}
}
/*
* Once the sliding is finished, we need to restore "isAnimating" flag.
* You can also do other things in this function, such as changing page title
* */
function onSectionChangeEnd() {
isAnimating = false;
}
/*
* When user resize it's browser we need to know the new height, so we can properly align the current section
* */
function onResize(event) {
//This will give us the new height of the window
var newPageHeight = $window.innerHeight();
/*
* If the new height is different from the old height ( the browser is resized vertically ), the sections are resized
* */
if (pageHeight !== newPageHeight) {
pageHeight = newPageHeight;
//This can be done via CSS only, but fails into some old browsers, so I prefer to set height via JS
TweenLite.set([$sectionsContainer, $sections], {
height: pageHeight + "px"
});
//The current section should be always on the top
TweenLite.set($sectionsContainer, {
scrollTo: {
y: pageHeight * $currentSection.index()
}
});
}
}body,
div,
p {
margin: 0;
padding: 0;
}
body {
font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
font-weight: 300;
letter-spacing: 0.0625em;
background-color: #000;
}
h1 {
color: #fff;
}
.sections-container {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: hidden;
z-index: 10;
}
.section {
position: absolute;
width: 100%;
height: 100%;
overflow: hidden;
display: none;
visibility: hidden;
opacity: 0;
}
#section-1 {
display: block;
visibility: visible;
opacity: 1;
}
.section .centered h1 {
text-align: center;
}
.section .centered p {
text-align: center;
}
#background {
position: absolute;
width: 100%;
height: 100%;
overflow: hidden;
display: block;
visibility: visible;
opacity: 1;
}
.bg-1 {
background-color: #5A4748;
}
.bg-2 {
background-color: #45959b;
}
.bg-3 {
background-color: #778899;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/latest/TweenLite.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/latest/plugins/CSSPlugin.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/latest/plugins/ScrollToPlugin.min.js"></script>
<div id="background"></div>
<div class="sections-container">
<div class="section" id="section-1">
<div class="centered">
<h1>1</h1>
</div>
</div>
<div class="section" id="section-2">
<div class="centered">
<h1>2</h1>
</div>
</div>
<div class="section" id="section-3">
<div class="centered">
<h1>3</h1>
</div>
</div>
</div>