Question

是否可以选择以下浏览器对象：

::-webkit-scrollbar
::-webkit-scrollbar-track
::-webkit-scrollbar-thumb

通过jQuery吗？

#scroller {
  background: #fff;
  height: 300px;
  width: 400px;
  overflow: hidden;
  overflow-y: scroll;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="scroller">
  <p>
    Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up
    one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum
    et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section
    1.10.32. Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia,
    looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de
    Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from
    a line in section 1.10.32. Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney
    College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32
    and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit
    amet..", comes from a line in section 1.10.32.
  </p>
</div>

Answer 1

您可以“读取”伪元素的值，但是您无法更改它们，所以我发现了。

尝试设置属性值会返回错误：

无法在'CSSStyleDeclaration'上执行'setProperty'：这些样式已计算出来，因此'width'属性是只读的。

var width = window.getComputedStyle(
  document.querySelector('#scroller'), '::-webkit-scrollbar').getPropertyValue('width');

console.log('::-webkit-scrollbar width> ' + width);

$(document).on('click', function() {
  // window.getComputedStyle(document.querySelector('.element'), '::-webkit-scrollbar').setProperty('width', '8px');
});

#scroller {
  width: 300px;
  height: 300px;
  overflow-y: scroll;
  background: #eee;
}

#scroller::-webkit-scrollbar {
  width: 10px !important;
}


/* Track */
#scroller::-webkit-scrollbar-track {
  background: #eee !important;
}


/* Handle */
#scroller::-webkit-scrollbar-thumb {
  background: #555 !important;
}


/* Handle on hover */
#scroller::-webkit-scrollbar-thumb:hover {
  background: #777 !important;
}

#scroller p {
  height: 800px;
  width: 100%;
  background: #ccc;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="scroller">
  <p>
  </p>
</div>

是否可以使用jQuery选择浏览器元素（如滚动条）？

1 个答案: