Html 如何设置div背景色的宽度？

我有两个背景颜色相同的

s。如何设置背景的宽度

预期结果：

以下是HTML：

<div>
    <span>100% width of background</span>
</div>
<div>
    <span>75% width of background</span>
</div>

当然

---

除了设置

div

的

width

之外，是否可以执行此操作？

您可以使用带有硬停止的背景渐变

---

您不能使用简单的背景色，但可以使用CSS渐变

背景色

始终被视为整个元素的单一纯色，但渐变被视为图像，并且可以调整大小。您还可以使用渐变进行其他操作，例如分层多个渐变，这是使用简单的

背景色所无法做到的
您可以使用渐变：

background: url(data:image/svg+xml;base64,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);
background: -moz-linear-gradient(left,  rgba(30,87,153,1) 0%, rgba(30,87,153,1) 69%, rgba(30,87,153,0) 70%, rgba(30,87,153,0) 100%);
background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(30,87,153,1)), color-stop(69%,rgba(30,87,153,1)), color-stop(70%,rgba(30,87,153,0)), color-stop(100%,rgba(30,87,153,0)));
background: -webkit-linear-gradient(left,  rgba(30,87,153,1) 0%,rgba(30,87,153,1) 69%,rgba(30,87,153,0) 70%,rgba(30,87,153,0) 100%);
background: -o-linear-gradient(left,  rgba(30,87,153,1) 0%,rgba(30,87,153,1) 69%,rgba(30,87,153,0) 70%,rgba(30,87,153,0) 100%);
background: -ms-linear-gradient(left,  rgba(30,87,153,1) 0%,rgba(30,87,153,1) 69%,rgba(30,87,153,0) 70%,rgba(30,87,153,0) 100%);
background: linear-gradient(to right,  rgba(30,87,153,1) 0%,rgba(30,87,153,1) 69%,rgba(30,87,153,0) 70%,rgba(30,87,153,0) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#1e5799', endColorstr='#001e5799',GradientType=1 );


我会使用1px图像作为背景，比如
background:url（1px.png）repeat-y然后您可以设置
背景大小：75%现在是图像。使生活更轻松，代码也更少/更简单。
U应将css更改为：

div {
    background-color: #fc0;
    margin: 2px;
}
 div:last-child {

      background-image: -webkit-linear-gradient(left, #fc0, #fc0 75%, transparent 75%,     transparent 100%)
}

背景大小仅适用于背景图像。为什么不只使用div的宽度@斯蒂芬诺，很明显。我用它来让我的解释更容易理解：）@Danko，重读问题的最后一段。它不适合我，因为跨度的宽度可能比div的宽度大。@samosfator不，它不是。你用错了，我可以假设你知道我看到了发电机。非常感谢。但是如何在那里使渐变停止呢？在最后一个子div元素中添加一行以删除继承bg颜色：背景色：透明；这是因为您的小提琴有一些小错误，请参阅此更新：错误：1。您的1px手持图像是白色的，因此您无法真正看到它。做一个你喜欢的颜色，我用了我的一个测试背景。您的背景属性名称重复，因此导致错误。3。未指定div的默认背景大小。
background: url(data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiA/Pgo8c3ZnIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgdmlld0JveD0iMCAwIDEgMSIgcHJlc2VydmVBc3BlY3RSYXRpbz0ibm9uZSI+CiAgPGxpbmVhckdyYWRpZW50IGlkPSJncmFkLXVjZ2ctZ2VuZXJhdGVkIiBncmFkaWVudFVuaXRzPSJ1c2VyU3BhY2VPblVzZSIgeDE9IjAlIiB5MT0iMCUiIHgyPSIxMDAlIiB5Mj0iMCUiPgogICAgPHN0b3Agb2Zmc2V0PSIwJSIgc3RvcC1jb2xvcj0iIzFlNTc5OSIgc3RvcC1vcGFjaXR5PSIxIi8+CiAgICA8c3RvcCBvZmZzZXQ9IjY5JSIgc3RvcC1jb2xvcj0iIzFlNTc5OSIgc3RvcC1vcGFjaXR5PSIxIi8+CiAgICA8c3RvcCBvZmZzZXQ9IjcwJSIgc3RvcC1jb2xvcj0iIzFlNTc5OSIgc3RvcC1vcGFjaXR5PSIwIi8+CiAgICA8c3RvcCBvZmZzZXQ9IjEwMCUiIHN0b3AtY29sb3I9IiMxZTU3OTkiIHN0b3Atb3BhY2l0eT0iMCIvPgogIDwvbGluZWFyR3JhZGllbnQ+CiAgPHJlY3QgeD0iMCIgeT0iMCIgd2lkdGg9IjEiIGhlaWdodD0iMSIgZmlsbD0idXJsKCNncmFkLXVjZ2ctZ2VuZXJhdGVkKSIgLz4KPC9zdmc+);
background: -moz-linear-gradient(left,  rgba(30,87,153,1) 0%, rgba(30,87,153,1) 69%, rgba(30,87,153,0) 70%, rgba(30,87,153,0) 100%);
background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(30,87,153,1)), color-stop(69%,rgba(30,87,153,1)), color-stop(70%,rgba(30,87,153,0)), color-stop(100%,rgba(30,87,153,0)));
background: -webkit-linear-gradient(left,  rgba(30,87,153,1) 0%,rgba(30,87,153,1) 69%,rgba(30,87,153,0) 70%,rgba(30,87,153,0) 100%);
background: -o-linear-gradient(left,  rgba(30,87,153,1) 0%,rgba(30,87,153,1) 69%,rgba(30,87,153,0) 70%,rgba(30,87,153,0) 100%);
background: -ms-linear-gradient(left,  rgba(30,87,153,1) 0%,rgba(30,87,153,1) 69%,rgba(30,87,153,0) 70%,rgba(30,87,153,0) 100%);
background: linear-gradient(to right,  rgba(30,87,153,1) 0%,rgba(30,87,153,1) 69%,rgba(30,87,153,0) 70%,rgba(30,87,153,0) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#1e5799', endColorstr='#001e5799',GradientType=1 );

div {
    background-color: #fc0;
    margin: 2px;
}
 div:last-child {

      background-image: -webkit-linear-gradient(left, #fc0, #fc0 75%, transparent 75%,     transparent 100%)
}