css - 最大高度，溢出 :scroll and position

Question

我有一个元素需要能够根据放入其中的内容进行增长和收缩。它有多个嵌套的 div 以适应分层元素。

我遇到的问题是当内容大于最大高度时让它滚动。

我相信这是由于所有父 div 都是 position: absolute。如果我使溢出元素成为绝对元素，那么我得到的只是一个空空间 IE 周围的边框；一个点。即使我给它设置了宽度和高度，也会发生这种情况。如果我将它设置为相对的，那么它会正确显示所有内容，但溢出元素的内容会超过包含元素的底部，即使它设置为溢出:滚动或自动。

所以我需要一种方法让父元素识别溢出的大小并扩展以包含它们，同时允许溢出元素在超过特定大小后滚动。

html代码

<div id="container">
    <div id="border">
        <div id="text">
            TEXT TO BE ENTERED VIA JS
        </div>
    </div>
</div>

目前的CSS代码

#container
{
position: fixed;
top: 0px;
right: 0px;
bottom: 0px;
width: 50%;
padding: 0;
margin: 0;
}

#border
{
position: absolute;
top: 2.5%;
border: 2px solid black;
border-radius: 20px;
background-color: LightGoldenRodYellow;
padding: 0;
margin: 0% 5%;
max-height: 95%;
overflow: hidden;
}

#text    // this is the part I am having trouble with.
{
position: relative;
max-height:80%;
overflow-y: scroll;
overflow-x: hidden;
}

Answer 1

#container {
    position: fixed;
    top: 0px;
    right: 0px;
    bottom: 0px;
    width: 50%;
    padding: 0;
    margin: 0;
}
#border {
    position: absolute;
    top: 2.5%;
    border: 2px solid black;
    border-radius: 20px;
    background-color: lightgoldenrodyellow;
    padding: 0;
    margin: 0% 5%;
    max-height: 95%;
    width: 200px;
    overflow: hidden;
}

#text {
    overflow-y: scroll;
    overflow-x: hidden;
    max-height: 200px;
}

<div id="container">
    <div id="border">
        <div id="text">TEXT TO BE ENTERED VIA JS saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    </div>
</div>

给你。