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我在當前的Firefox中有一個奇怪的錯誤。我運行一個腳本視差(我認爲它來自Materialise公司),這是源:Firefox加載視差圖像大小錯誤(只刷新)
(function($) {
$.fn.parallax = function() {
var window_width = $(window).width();
return this.each(function(i) {
var $this = $(this);
$this.addClass('parallax');
$this.find('img').each(function() {
$(this).css('background-image', 'url(' + $(this).prop('currentSrc') + ')');
$(this).attr('src', 'data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==');
$(this).attr('srcset', '');
});
function updateParallax(initial) {
var container_height;
// if (window_width < 992) {
container_height = ($this.height() > 0) ? $this.height() : $this.children("img").height();
// }
// else {
// container_height = ($this.height() > 0) ? $this.height() : 500;
// }
var img_height = $this.children("img").height();
var parallax_dist = img_height - container_height;
var bottom = $this.offset().top + container_height;
var top = $this.offset().top;
var scrollTop = $(window).scrollTop();
var windowHeight = window.innerHeight;
var windowBottom = scrollTop + windowHeight;
var percentScrolled = (windowBottom - bottom)/(container_height + windowHeight);
var parallax = -1 * parallax_dist * percentScrolled;
console.log(
'img_height: ' + img_height + '\n' +
'parallax_dist: ' + parallax_dist + '\n' +
'bottom: ' + bottom + '\n' +
'top: ' + top + '\n' +
'scrollTop: ' + scrollTop + '\n' +
'windowHeight: ' + windowHeight + '\n' +
'windowBottom: ' + windowBottom + '\n' +
'percentScrolled: ' + percentScrolled + '\n' +
'parallax: ' + parallax + '\n'
);
if ((bottom > scrollTop) && (top < (scrollTop + windowHeight))) {
$this.children("img").first().css('bottom', parallax + "px");
}
if (initial) {
$this.children("img").first().css('display', 'block');
}
}
// Wait for image load
$this.children("img").one("load", function() {
updateParallax(true);
}).each(function() {
if (this.complete) $(this).load();
});
$(window).scroll(function() {
window_width = $(window).width();
updateParallax(false);
});
$(window).resize(function() {
window_width = $(window).width();
updateParallax(false);
});
});
};
}(jQuery));
.parallax-container {
position: relative;
overflow: hidden;
height: 500px;
}
.parallax {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
z-index: -1;
}
.parallax img {
display: none;
position: absolute;
bottom: 0;
width: 100%;
max-width: 100%;
min-height: 100%;
background-position: bottom;
background-size: contain;
background-repeat: no-repeat;
}
<div class="full-parallax parallax-container">
<div class="parallax">
<img src="http://lorempixel.com/1000/1000/" srcset="http://lorempixel.com/1000/1000/ 2000w, http://lorempixel.com/500/500/ 500w" alt="">
</div>
</div>
<div class="content">
<h1>Hello!</h1>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
<p>Text text text text text text</p>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$('.parallax').parallax();
});
</script>
這工作都很好,但在Firefox這僅適用於如果我加載頁面(或者通過刪除緩存重新加載)。 如果我正常重新加載頁面(F5),則視差無法正確加載(圖像太遠),直到我滾動第一個圖像爲止,然後圖像跳到正確的位置。
這個問題似乎是FF加載錯誤的圖像大小。在沒有緩存的情況下重新加載時,它讀取1707中相同圖像的圖像高度,並在正常重新加載緩存時讀取678.只要我開始滾動,該值跳到1707。
編輯:它也只發生,如果頁面滾動到絕對頂部,如果我向下滾動1px它正確加載圖像。
Chrome和Vivaldi做得很好。
我喜歡你的快速和骯髒的思想,但不,不幫幫我。 – newnoise
@newnoise哈哈......有時候雖然有幫助。或'$(window).trigger('resize');';) –