只有一个部分可滚动，而不是整个页面

Question

我正在开发一个项目，其中一个部分通过从数据库请求数据来填充元素，因此其中的元素数量极其多变。

棘手的部分是我们的设计基于不必在页面上滚动的想法，而是在必要时滚动部分。我认为在这些部分上使用overflow就足够了，但它并没有给我预期的结果。

我尝试了overflow属性的所有变体，scroll显示了一个滚动条，但它似乎被冻结了。

如何让section-one在其内部可滚动，而不会使页面的其余部分可滚动？

我创建了一个带有虚拟版本的代码笔来演示问题：http://codepen.io/leofontes/pen/aNaBox

body {
  overflow: hidden;
}

main {
  margin: 0;
  width: 100%;
  height: 100%;
}

.section-one {
  background-color: #FF0000;
  float: left;
  min-height: 1400px;
  overflow: visible;
  width: 15%;
}

.section-two {
  background-color: #00FF00;
  float: left;
  min-height: 1400px;
  width: 70%;
}

.section-three {
  background-color: #0000FF;
  min-height: 1400px;
  float: left;
  width: 15%;
}

<main>
  <section class="section-one">
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
  </section>
  <section class="section-two">
    <p>this is section two</p>
  </section>
  <section class="section-three">
    <p>this is section three</p>
  </section>
</main>

谢谢

Answer 1

对CSS进行这些调整：

＆＃13;

＆＃13;

html {
  height: 100%;                       /* note #1 */
}
body {
  height: 100%;                       /* note #1 */
  margin: 0;                          /* note #2 */
  overflow: hidden;
}
main {
  margin: 0;
  height: 100%;
}
.section-one {
  background-color: #FF0000;
  float: left;
  overflow-y: auto;                  /* new */
  width: 15%;
  height: 100%;                      /* note #3 */
}
.section-two {
  background-color: #00FF00;
  float: left;
  min-height: 1400px;
  width: 70%;
}
.section-three {
  background-color: #0000FF;
  min-height: 1400px;
  float: left;
  width: 15%;
}

＆＃13;

<main>
  <section class="section-one">
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
    <p>this is section one</p>
  </section>
  <section class="section-two">
    <p>this is section two</p>
  </section>
  <section class="section-three">
    <p>this is section three</p>
  </section>

</main>

＆＃13;

＆＃13;

＆＃13;

Revised Codepen

注意：

1. When using percentage heights, parent elements must have a specified height.
2. Remove the default margin from the body element.
3. 向元素添加height会导致overflow生效。