jquery - 使文本列表保持在页脚上方，但能够将它们滚动到撰写栏下方

Question

我正在尝试滚动消息列表，使其位于撰写栏下方，但是当添加新消息时，它们应该添加到撰写栏的正上方。有关我的意思的快速演示，请参阅此 link 中的图片.

我的问题:

• 我无法根据内容大小控制内部 div 元素的宽度。

• 无法正确获得所需的滚动条(如图所示)

.contentContainer {
  margin: 0;
  padding: 0;
  margin-top: 68px;
  height: calc(100vh - 68px);
  display: block;
  overflow-y: auto;
}

.content {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  height: inherit;
}

.messageArea {
  flex-grow: 1;
  /*min-width: 400px;*/
  height: inherit;
  position: relative;
}

.scrollingMessagesList {
  height: inherit;
  overflow-x: hidden;
  overflow-y: auto;
  transform: translateZ(0);
}

.outer {
  margin: 0 auto;
  margin-top: 18px;
  margin-bottom: 142px;
  height: 414px;
  position: relative;
  background-color: #78909c;
}

.inner {
  margin: 0 20px;
  height: inherit;
  background-color: darkkhaki;
  display: flex;
  flex-direction: column-reverse;
  align-items: flex-end;
}

.inner p {
  width: auto;
  max-width: 100%;
  outline: none;
  padding-bottom: 2px;
  background-color: greenyellow;
}

.composeBar {
  z-index: 1029!important;
  border: none;
  bottom: 20px;
}

.compose {
  height: 52px;
  border-radius: 26px;
  background-color: white;
  box-shadow: 0 1px 5px 0 rgba(0, 0, 0, .16), 0 4px 4px 0 rgba(0, 0, 0, .10), 0 3px 3px 0 rgba(0, 0, 0, .08);
  ;
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="container-fluid contentContainer" style="background-color: blanchedalmond;">
  <div class="content">
    <div class="messageArea">
      <div class="scrollingMessagesList">
        <div class="outer">
          <div class="inner">
            <p>Text 1</p>
            <p>Text 2</p>
            <p>Text 3</p>
          </div>
        </div>
      </div>
      <div class="composeBar navbar-fixed-bottom">
        <div class="compose">
        </div>
      </div>
    </div>
  </div>
</div>

Answer 1

在这里，您可以检查我是否更新了您的代码，如果觉得有帮助，请查看。

$(document).ready(function() {
  function setHeight() {
    windowHeight = $(window).outerHeight();
    $('.inner').css('min-height', windowHeight - 68);
  };
  setHeight();
  
  $(window).resize(function() {
    setHeight();
  });
});

.contentContainer {
  margin: 0;
  padding: 0;
  display: block;
  overflow-y: auto;
  margin-top: 68px;
  height: calc(100vh - 68px);
}

.content {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  height: inherit;
}

.messageArea {
  flex-grow: 1;
  /*min-width: 400px;*/
  height: inherit;
  position: relative;
}

.scrollingMessagesList {
  height: inherit;
  overflow-x: hidden;
  overflow-y: auto;
  transform: translateZ(0);
}

.outer {
  margin: 0 auto;
  position: relative;
  background-color: #78909c;
}

.inner {
  margin: 0 20px;
  height: auto;
  background-color: darkkhaki;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: 60px;
  align-items: flex-end;
}

.inner p {  
  width: auto;
  max-width: 100%;
  outline: none;
  padding-bottom: 2px;
  background-color: greenyellow;
  
}

.composeBar {
  z-index: 1029!important;
  border: none;
  bottom: 5px !important;
  position: fixed;
}


.compose {
    height: 52px;
    border-radius: 26px;
    background-color: white;
    box-shadow: 0 1px 5px 0 rgba(0, 0, 0, .16), 0 4px 4px 0 rgba(0, 0, 0, .10), 0 3px 3px 0 rgba(0, 0, 0, .08);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="container-fluid contentContainer" style="background-color: blanchedalmond;">
  <div class="content">
    <div class="messageArea">
      <div class="scrollingMessagesList">
        <div class="outer">
          <div class="inner">
            <p>Text 1</p>
            <p>Text 2</p>
            <p>Text 3</p>
            <p>Text 4</p>
            <p>Text 5</p>
            <p>Text 6</p>
            <p>Text 7</p>
           <p>Text 7</p>
          </div>
        </div>
      </div>    
      <div class="composeBar navbar-fixed-bottom">
         <div class="compose">
         </div>
      </div>
    </div>
  </div>
</div>