看来我在使用 Firefox 时遇到了一些问题，我已经在我的网站上添加了一个 Logo 并通过这个 CSS block 设置了它的样式:
#splash div.logo > a {
background-image: url("../../---.png");
background-size: 280px;
height: 85px;
width: 280px;
}
当我用 Chrome 或除 Firefox 以外的任何其他浏览器打开网页时，它会以正确的方式显示，除非我放大它会显示一条细线， 从 Firefox 打开网页时，无论是否放大，都会在图像上方显示一条细线。
Logo 是通过这段代码动画的:
IndexPage: {
Splash: {
init: function() {
var $splash = $('#splash'),
$logo = $splash.find('#logo'),
frame = 1,
frameCount = 46
framesPerSecond = 50;
function animateLogo() {
var lastTime = 0;
var currTime = new Date().getTime();
// var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var timeToCall = 25;
if (typeof requestAnimationFrame == "undefined")
requestAnimationFrame = function (callback, element) {
return setTimeout(function () { callback(currTime + timeToCall); }, timeToCall);
};
if (frame <= frameCount) {
setTimeout(function() {
requestAnimationFrame(animateLogo, $logo);
$logo.css('background-position', '0 -' + (frame * 85) + 'px');
frame += 1;
}, timeToCall);
// lastTime = currTime + timeToCall;
}
}
$('form.search').on({
close: function() { $splash.removeClass('searching'); },
open: function() { $splash.addClass('searching'); }
});
if ($window.width() >= 532) {
$window.scroll(function() {
var top = $window.scrollTop();
$splash.find('div.logo').css('opacity', top > 150 ? 0 : (150 - top) / 150);
});
}
$window.resize(function() {
if ($splash.width() < 768) {
$logo.css('background-position', '0 0');
} else {
$logo.css('background-position', '0 -3910px');
}
});
if ($window.width() >= 768)
animateLogo();
}
}
}
有什么想法吗？
最佳答案
看起来 Firefox 在渲染之前对您的图像做了一些推断(我猜是为了性能)。它使用图像上像素的邻域计算要显示的像素，并且图像顶部的一些像素接近黑色像素，从而导致黑色/灰色线。
编辑:您可以在 CSS 中使用 image-rendering: optimizequality; 禁用此行为。
测试这个的片段:
var frame = 1,
frameCount = 46;
function animateLogo() {
$logo=$('.logo');
var lastTime = 0;
var currTime = new Date().getTime();
var timeToCall = 25;
if (typeof requestAnimationFrame == "undefined") {
requestAnimationFrame = function (callback, element) {
return setTimeout(function () {
callback(currTime + timeToCall);
}, timeToCall);
}
}
if (frame <= frameCount) {
setTimeout(function() {
requestAnimationFrame(animateLogo, $logo);
$logo.css('background-position', '0 -' + (frame * 85) + 'px');
frame += 1;
}, timeToCall);
}
}.logo {
background-image: url('data:image/png;base64,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background-size: 280px;
height: 85px;
width: 280px;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="logo"></div>
<button onclick="frame=0;$('.logo').css('image-rendering','auto');animateLogo()">Without CSS property (default)</button>
<button onclick="frame=0;$('.logo').css('image-rendering','optimizeQuality');animateLogo()">With CSS property</button>
旧答案: 您可以通过几个透明像素(或 Logo 后面的颜色)将图像上的 Sprite 分开，这样效果就不会再可见了。
关于javascript - Firefox 在使用 JavaScript 动画的 Logo 上方添加了不需要的细线，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35599182/
我正在学习如何使用Nokogiri，根据这段代码我遇到了一些问题:require'rubygems'require'mechanize'post_agent=WWW::Mechanize.newpost_page=post_agent.get('http://www.vbulletin.org/forum/showthread.php?t=230708')puts"\nabsolutepathwithtbodygivesnil"putspost_page.parser.xpath('/html/body/div/div/div/div/div/table/tbody/tr/td/div
我有一个Ruby程序，它使用rubyzip压缩XML文件的目录树。gem。我的问题是文件开始变得很重，我想提高压缩级别，因为压缩时间不是问题。我在rubyzipdocumentation中找不到一种为创建的ZIP文件指定压缩级别的方法。有人知道如何更改此设置吗？是否有另一个允许指定压缩级别的Ruby库？ 最佳答案 这是我通过查看rubyzip内部创建的代码。level=Zlib::BEST_COMPRESSIONZip::ZipOutputStream.open(zip_file)do|zip|Dir.glob("**/*")d
类classAprivatedeffooputs:fooendpublicdefbarputs:barendprivatedefzimputs:zimendprotecteddefdibputs:dibendendA的实例a=A.new测试a.foorescueputs:faila.barrescueputs:faila.zimrescueputs:faila.dibrescueputs:faila.gazrescueputs:fail测试输出failbarfailfailfail.发送测试[:foo,:bar,:zim,:dib,:gaz].each{|m|a.send(m)resc
很好奇，就使用rubyonrails自动化单元测试而言，你们正在做什么？您是否创建了一个脚本来在cron中运行rake作业并将结果邮寄给您？git中的预提交Hook？只是手动调用？我完全理解测试，但想知道在错误发生之前捕获错误的最佳实践是什么。让我们理所当然地认为测试本身是完美无缺的，并且可以正常工作。下一步是什么以确保他们在正确的时间将可能有害的结果传达给您？ 最佳答案 不确定您到底想听什么，但是有几个级别的自动代码库控制:在处理某项功能时，您可以使用类似autotest的内容获得关于哪些有效，哪些无效的即时反馈。要确保您的提
假设我做了一个模块如下:m=Module.newdoclassCendend三个问题:除了对m的引用之外，还有什么方法可以访问C和m中的其他内容？我可以在创建匿名模块后为其命名吗(就像我输入“module...”一样)？如何在使用完匿名模块后将其删除，使其定义的常量不再存在？ 最佳答案 三个答案:是的，使用ObjectSpace.此代码使c引用你的类(class)C不引用m:c=nilObjectSpace.each_object{|obj|c=objif(Class===objandobj.name=~/::C$/)}当然这取决于
我正在尝试使用ruby和Savon来使用网络服务。测试服务为http://www.webservicex.net/WS/WSDetails.aspx?WSID=9&CATID=2require'rubygems'require'savon'client=Savon::Client.new"http://www.webservicex.net/stockquote.asmx?WSDL"client.get_quotedo|soap|soap.body={:symbol=>"AAPL"}end返回SOAP异常。检查soap信封，在我看来soap请求没有正确的命名空间。任何人都可以建议我
关闭。这个问题是opinion-based.它目前不接受答案。想要改进这个问题？更新问题，以便editingthispost可以用事实和引用来回答它.关闭4年前。Improvethisquestion我想在固定时间创建一系列低音和高音调的哔哔声。例如:在150毫秒时发出高音调的蜂鸣声在151毫秒时发出低音调的蜂鸣声200毫秒时发出低音调的蜂鸣声250毫秒的高音调蜂鸣声有没有办法在Ruby或Python中做到这一点？我真的不在乎输出编码是什么(.wav、.mp3、.ogg等等)，但我确实想创建一个输出文件。
我在我的项目目录中完成了compasscreate.和compassinitrails。几个问题:我已将我的.sass文件放在public/stylesheets中。这是放置它们的正确位置吗？当我运行compasswatch时，它不会自动编译这些.sass文件。我必须手动指定文件:compasswatchpublic/stylesheets/myfile.sass等。如何让它自动运行？文件ie.css、print.css和screen.css已放在stylesheets/compiled。如何在编译后不让它们重新出现的情况下删除它们？我自己编译的.sass文件编译成compiled/t
我想将html转换为纯文本。不过，我不想只删除标签，我想智能地保留尽可能多的格式。为插入换行符标签，检测段落并格式化它们等。输入非常简单，通常是格式良好的html(不是整个文档，只是一堆内容，通常没有anchor或图像)。我可以将几个正则表达式放在一起，让我达到80%，但我认为可能有一些现有的解决方案更智能。 最佳答案 首先，不要尝试为此使用正则表达式。很有可能你会想出一个脆弱/脆弱的解决方案，它会随着HTML的变化而崩溃，或者很难管理和维护。您可以使用Nokogiri快速解析HTML并提取文本:require'nokogiri'h
我想为Heroku构建一个Rails3应用程序。他们使用Postgres作为他们的数据库，所以我通过MacPorts安装了postgres9.0。现在我需要一个postgresgem并且共识是出于性能原因你想要pggem。但是我对我得到的错误感到非常困惑当我尝试在rvm下通过geminstall安装pg时。我已经非常明确地指定了所有postgres目录的位置可以找到但仍然无法完成安装:$envARCHFLAGS='-archx86_64'geminstallpg--\--with-pg-config=/opt/local/var/db/postgresql90/defaultdb/po