Chrome中div之间的1像素白色间距

Question

JSFiddle: http://jsfiddle.net/lustre/c6cwbjLz/13/

我一直在尝试制作一个全屏3x2网格，实际上已经做到了，但当我悬停在网格项上时，在第二列和第三列之间会出现一条1像素的细竖线。这是什么原因，并且如何消除它？

我在其他地方读到，包括-webkit-backface-visibility：hidden;可以在使用3D变换时有所帮助；然而，我没有使用任何3D变换。这行代码在某种程度上确实起作用，因为它在某些尺寸上隐藏了白色线条，但在其他情况下仍然会出现（我认为是当它不能被3整除时？）。我已在以下的JSFiddle中注释掉此行代码，以便您可以轻松查看悬停时出现的白色线条。

如果您没有遇到过这个问题，下面是我看到的屏幕截图。不过迄今为止，我只在Chrome浏览器中遇到了这个问题。

JSFiddle: http://jsfiddle.net/lustre/c6cwbjLz/13/

jQuery(document).ready(function () {
    gridSize();
});

jQuery(window).resize(function () {
    gridSize();
});

/* Returns scrollbar width*/
function getScrollBarWidth() {
    var inner = document.createElement('p');
    inner.style.width = "100%";
    inner.style.height = "200px";

    var outer = document.createElement('div');
    outer.style.position = "absolute";
    outer.style.top = "0px";
    outer.style.left = "0px";
    outer.style.visibility = "hidden";
    outer.style.width = "200px";
    outer.style.height = "150px";
    outer.style.overflow = "hidden";
    outer.appendChild(inner);

    document.body.appendChild(outer);
    var w1 = inner.offsetWidth;
    outer.style.overflow = 'scroll';
    var w2 = inner.offsetWidth;
    if (w1 == w2) w2 = outer.clientWidth;

    document.body.removeChild(outer);

    return (w1 - w2);
};

function gridSize() {
    
    if ($('.box').width() > 0) {
        var w = $(window).width();    
    } else {
        var w = $(window).width() - getScrollBarWidth();
    }

    var h = $(window).height();

    var thirdw, halfw, halfh, overboxw, overboxh;
    
    /* Width needs to be 33%, height needs to be 50% */
    /* Full screen sizes */
    thirdw = w / 3;
    halfh = h / 2;

    $('.box').css({
        "width": thirdw,
            "height": halfh
    });

    /* Set overbox size */

    overboxw = thirdw - 60;
    overboxh = halfh - 60;

    $('.box .overbox').css({
        "width": overboxw,
            "height": overboxh
    });

    /* Resize the images based on the ratio */
    if (thirdw > halfh) {
        jQuery('.box img').css({
            "height": halfh +"px",
   "width": "auto"
        });
    } else {
        jQuery('.box img').css({
            //"height": halfh +"px"
        });
    }

    /*
    Bottom's affected:
    .box:hover .title == 110px (needs moving up depending on width of box as content beneath grows in height)
    
    */

}

body {
    margin:0;
    padding:0;
}

.boxWrapper {
    font-size:0;
    /*-webkit-backface-visibility: hidden;*/
}

.box {
    cursor: pointer;
    height: 400px;
    position: relative;
    overflow: hidden;
    width: 300px;
    z-index:400;
    display:inline-block;
}
.gradient {
    background: -moz-linear-gradient(top, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
    /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, rgba(255, 255, 255, 0)), color-stop(50%, rgba(128, 128, 128, 0)), color-stop(100%, rgba(0, 0, 0, 0.5)));
    /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
    /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
    /* Opera 11.10+ */
    background: -ms-linear-gradient(top, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
    /* IE10+ */
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
    /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#00ffffff', endColorstr='#80000000', GradientType=0);
    /* IE6-9 */
    z-index:401;
    width:100%;
    height:100%;
    position:absolute;
    top:0;
    left:0;
}
.box img {
    position: absolute;
    left: 0;
    -webkit-transition: all 300ms ease-out;
    -moz-transition: all 300ms ease-out;
    -o-transition: all 300ms ease-out;
    -ms-transition: all 300ms ease-out;
    transition: all 300ms ease-out;
    z-index:400;
}
.box .title {
    position:absolute;
    bottom:20px;
    left:25px;
    text-transform:uppercase;
    z-index:404;
    color:#fff;
    font-size:30px;
    -webkit-transition: all 300ms ease-out;
    -moz-transition: all 300ms ease-out;
    -o-transition: all 300ms ease-out;
    -ms-transition: all 300ms ease-out;
    transition: all 300ms ease-out;
}
.box .title:after {
    content:'';
    margin-top:5px;
    display:block;
    height:4px;
    width:60%;
    background:#fff;
}
.box:hover .title {
    bottom:110px;
    -webkit-transition: all 300ms ease-out;
    -moz-transition: all 300ms ease-out;
    -o-transition: all 300ms ease-out;
    -ms-transition: all 300ms ease-out;
    transition: all 300ms ease-out;
}
.box .overbox {
    background-color: rgba(246, 48, 62, 0.85);
    margin: 10px;
    padding: 20px;
    width: 240px;
    height: 340px;
    position: absolute;
    color: #fff;
    z-index: 403;
    -webkit-transition: all 300ms ease-out;
    -moz-transition: all 300ms ease-out;
    -o-transition: all 300ms ease-out;
    -ms-transition: all 300ms ease-out;
    transition: all 300ms ease-out;
    opacity: 0;
}
.box:hover .overbox {
    opacity: 1;
    -webkit-transition: all 300ms ease-out;
    -moz-transition: all 300ms ease-out;
    -o-transition: all 300ms ease-out;
    -ms-transition: all 300ms ease-out;
    transition: all 300ms ease-out;
}
.box .overbox .tagline {
    position:absolute;
    bottom:0;
    padding-right: 20px;
    -webkit-transition: all 300ms ease-out;
    -moz-transition: all 300ms ease-out;
    -o-transition: all 300ms ease-out;
    -ms-transition: all 300ms ease-out;
    transition: all 300ms ease-out;
    font-size:16px;
}

.box:hover .overbox .tagline {
    bottom:20px;
    -webkit-transition: all 300ms ease-out;
    -moz-transition: all 300ms ease-out;
    -o-transition: all 300ms ease-out;
    -ms-transition: all 300ms ease-out;
    transition: all 300ms ease-out;
}

<div class="boxWrapper">
<div class="box">
    <div class="gradient"></div>
    <img src="http://www.webtutorialplus.com/Images/css-effects-image/1.jpg" alt="Web Tutorial Plus - Demo" width="300" height="400" />
    <div class="title">Title</div>
    <div class="overbox">
        <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
</div>
<div class="box">
    <div class="gradient"></div>
    <img src="http://www.webtutorialplus.com/Images/css-effects-image/1.jpg" alt="Web Tutorial Plus - Demo" width="300" height="400" />
    <div class="title">Title</div>
    <div class="overbox">
        <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
</div>
<div class="box">
    <div class="gradient"></div>
    <img src="http://www.webtutorialplus.com/Images/css-effects-image/1.jpg" alt="Web Tutorial Plus - Demo" width="300" height="400" />
    <div class="title">Title</div>
    <div class="overbox">
        <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
</div>
<div class="box">
    <div class="gradient"></div>
    <img src="http://www.webtutorialplus.com/Images/css-effects-image/1.jpg" alt="Web Tutorial Plus - Demo" width="300" height="400" />
    <div class="title">Title</div>
    <div class="overbox">
        <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
</div>
<div class="box">
    <div class="gradient"></div>
    <img src="http://www.webtutorialplus.com/Images/css-effects-image/1.jpg" alt="Web Tutorial Plus - Demo" width="300" height="400" />
    <div class="title">Title</div>
    <div class="overbox">
        <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
</div>
<div class="box">
    <div class="gradient"></div>
    <img src="http://www.webtutorialplus.com/Images/css-effects-image/1.jpg" alt="Web Tutorial Plus - Demo" width="300" height="400" />
    <div class="title">Title</div>
    <div class="overbox">
        <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
</div>
</div>
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- Natalie

---

请在实际问题中包含HTML/CSS以重现此问题。否则，此问题可能会被关闭。 - TylerH

我已经包含了一个JSFiddle链接，其中包含了问题。由于使用了一些JS代码，我认为这会更容易？ - Natalie

你应该找出哪一段代码引起了问题，而不是把所有的代码都放在一起。 - Todd Mark

Answer 1

像素舍入。如果你生成的宽度是1000px，那么每列应该在333.33̅px生成。

然而，每个浏览器/版本不幸地处理小数像素的方式都不同。这里有一个方便的指南：http://cruft.io/posts/percentage-calculations-in-ie/

震惊！IE是最糟糕的。如果你在IE中运行它，请确保你的窗口宽度为1001px，看看它是如何呈现的。我预计你的333.66̅px将不幸地被四舍五入为333.67，并可能会裁剪第三列。

要做你需要做的事情，你实际上根本不需要JS：

http://jsfiddle.net/c6cwbjLz/14/

html,
body {
  height: 100%;
  width: 100%;
}
body {
  margin: 0;
  padding: 0;
}
.boxWrapper {
  font-size: 0;
  height: 100%;
  width: 100%;
  /*-webkit-backface-visibility: hidden;*/
}
.gradient {
  background: -moz-linear-gradient(top, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
  /* FF3.6+ */
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, rgba(255, 255, 255, 0)), color-stop(50%, rgba(128, 128, 128, 0)), color-stop(100%, rgba(0, 0, 0, 0.5)));
  /* Chrome,Safari4+ */
  background: -webkit-linear-gradient(top, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
  /* Chrome10+,Safari5.1+ */
  background: -o-linear-gradient(top, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
  /* Opera 11.10+ */
  background: -ms-linear-gradient(top, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
  /* IE10+ */
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(128, 128, 128, 0) 50%, rgba(0, 0, 0, 0.5) 100%);
  /* W3C */
  filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#00ffffff', endColorstr='#80000000', GradientType=0);
  /* IE6-9 */
}
.box {
  cursor: pointer;
  height: 50%;
  position: relative;
  overflow: hidden;
  width: 33.33%;
  z-index: 400;
  display: inline-block;
  background-image: url("http://www.webtutorialplus.com/Images/css-effects-image/1.jpg");
  background-size: cover;
}
.box .title {
  position: absolute;
  bottom: 20px;
  left: 25px;
  text-transform: uppercase;
  z-index: 404;
  color: #fff;
  font-size: 30px;
  -webkit-transition: all 300ms ease-out;
  -moz-transition: all 300ms ease-out;
  -o-transition: all 300ms ease-out;
  -ms-transition: all 300ms ease-out;
  transition: all 300ms ease-out;
}
.box .title:after {
  content: '';
  margin-top: 5px;
  display: block;
  height: 4px;
  width: 60%;
  background: #fff;
}
.box:hover .title {
  bottom: 110px;
  -webkit-transition: all 300ms ease-out;
  -moz-transition: all 300ms ease-out;
  -o-transition: all 300ms ease-out;
  -ms-transition: all 300ms ease-out;
  transition: all 300ms ease-out;
}
.box .overbox {
  background-color: rgba(246, 48, 62, 0.85);
  margin: 10px;
  padding: 20px;
  box-sizing: border-box;
  /*make border and padding include in height/width */
  width: calc(100% - 20px);
  height: calc(100% - 20px);
  position: absolute;
  color: #fff;
  z-index: 403;
  -webkit-transition: all 300ms ease-out;
  -moz-transition: all 300ms ease-out;
  -o-transition: all 300ms ease-out;
  -ms-transition: all 300ms ease-out;
  transition: all 300ms ease-out;
  opacity: 0;
}
.box:hover .overbox {
  opacity: 1;
  -webkit-transition: all 300ms ease-out;
  -moz-transition: all 300ms ease-out;
  -o-transition: all 300ms ease-out;
  -ms-transition: all 300ms ease-out;
  transition: all 300ms ease-out;
}
.box .overbox .tagline {
  position: absolute;
  bottom: 0;
  padding-right: 20px;
  -webkit-transition: all 300ms ease-out;
  -moz-transition: all 300ms ease-out;
  -o-transition: all 300ms ease-out;
  -ms-transition: all 300ms ease-out;
  transition: all 300ms ease-out;
  font-size: 16px;
}
.box:hover .overbox .tagline {
  bottom: 20px;
  -webkit-transition: all 300ms ease-out;
  -moz-transition: all 300ms ease-out;
  -o-transition: all 300ms ease-out;
  -ms-transition: all 300ms ease-out;
  transition: all 300ms ease-out;
}

<div class="boxWrapper">
  <div class="box gradient">
    <div class="title">Title</div>
    <div class="overbox">
      <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
  </div>
  <div class="box gradient">
    <div class="title">Title</div>
    <div class="overbox">
      <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
  </div>
  <div class="box gradient">
    <div class="title">Title</div>
    <div class="overbox">
      <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
  </div>
  <div class="box gradient">
    <div class="title">Title</div>
    <div class="overbox">
      <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
  </div>
  <div class="box gradient">
    <div class="title">Title</div>
    <div class="overbox">
      <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
  </div>
  <div class="box gradient">
    <div class="title">Title</div>
    <div class="overbox">
      <div class="tagline">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras efficitur ex velit, eget pellentesque dui dictum at.</div>
    </div>
  </div>
</div>aaaaaaaaaaa bbbbbbbbbbb ccccccccccc

我曾经遇到过一个类似的问题，使用简单的width: 33.33%就解决了。请注意，在我的情况下，我需要使用JS计算高度和宽度以适应其他无法响应式工作的内容。

- Jamie Barker

---

感谢您的反馈。如果是这种情况，您会建议采取什么措施来解决？编辑：刚在IE:8中检查了页面渲染，我没有看到任何白色像素。 - Natalie

@Natalie 我正在进行配置 :)。 - Jamie Barker

看起来很不错！谢谢；然而，在某些大小下，我仍然会偶尔看到一条白线。例如，如果.boxwrapper 设置为1060像素宽，并且我快速悬停在第一个和第二个网格项上，我仍然会看到1像素的白色间隙。 - Natalie

你使用的是哪个版本的Chrome？我正在使用43.0.2357.130 m。另外，你遇到了什么问题？当将鼠标悬停在1、2或3上时，在5和6之间会出现一条白线。只是确认我看到的与你看到的一样。 - Jamie Barker

我正在使用 43.0.2357.130 m。而且我看到的正是你目前所看到的 :) - Natalie