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我正嘗試創建一個腳本,用於在用戶垂直滾動時從右向左移動div。它應該對任何具有「sidepara」類的div做這個效果。它應該只移動div,如果它是可見的(用戶已滾動到它)。我很難得到正確的數學....什麼是正確的公式水平移動成正比的垂直滾動位置?垂直滾動時水平移動DIV
$(function() {
$(window).scroll(function() {
console.clear();
$(".sidepara").each(function() {
var sY = $(this).position().top - $(window).scrollTop(),
dY = $(this).position().top,
wH = window.innerHeight;
var scrollPercent = (sY/(dY - wH));
var position = (scrollPercent * ($(document).width()));
position = window.innerWidth - position;
$(this).css("margin-left", position);
console.log("scoll Y: " + sY);
console.log("div Y: " + dY);
console.log("div X: " + position);
console.log("window height: " + wH);
console.log("scrollPercent: " + scrollPercent);
console.log("----");
//print number for debugging
$(this).html(position);
});
})
});
html,
body {
margin: 0;
padding: 0;
}
.stretch {
height: 2000px;
}
.sidepara {
color: red;
}
.parallaxContainer {
overflow: hidden;
width: 100%;
height: 256px;
background: black;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="stretch"></div>
<div class="parallaxContainer">
<!-- <img src="helloworld.png" class="sidepara" /> -->
<div class="sidepara"></div>
</div>
<div class="stretch"></div>
<div class="parallaxContainer">
<!-- <img src="helloworld.png" class="sidepara" /> -->
<div class="sidepara"></div>
</div>
<div class="stretch"></div>
<div class="parallaxContainer">
<!-- <img src="helloworld.png" class="sidepara" /> -->
<div class="sidepara"></div>
</div>
<div class="stretch"></div>
我會建議你申請你的數學當DIV是視內。要告訴div是否在視口中,您可以諮詢[此答案](https://stackoverflow.com/a/7557433/4543207) – Redu
有趣!我會看看! – bwoogie