Flexbox flex -当flex项包含输入元素时不考虑flex-grow属性

Question

我正在使用flexbox制作一个聊天UI。首先，使用flex-grow属性，我将布局划分为2列，比率为2/5，然后将这2列划分为行，第一列的比率为1/9，第二列的比率为5/1。这是我没有将输入元素添加到HTML代码中时得到的结果：

https://codepen.io/thenr/pen/PoooyEN

​

#chat {
  display: flex;
  width: 100%;
  height: calc(100vh - 2em);
  overflow-y: hidden;
}

#friends {
  flex-grow: 2;
  display: flex;
  flex-direction: column;
  border: 1px solid black;
}

#messages {
  flex-grow: 5;
  display: flex;
  flex-direction: column;
  border: 1px solid black;
}

#searchfriend {
  flex-grow: 1;
  flex-shrink: 1;
  flex-basis: 120px;
  border: 1px solid black;
  background-color: blue;
}

#searchfriend input[type="text"] {
  margin: 0;
  padding: 1em;
  border: 0;
  border-radius: 0px;
  background-color: #d1d1d1;
}

#friendslist {
  flex-grow: 9;
  border: 1px solid black;
  overflow-y: auto;
}

.friend {
  height: 100px;
  border: 1px solid black;
}

#chatmessages {
  flex-grow: 5;
  border: 1px solid black;
}

#writemessage {
  flex-grow: 1;
  border: 1px solid black;
}

<div id="chat">
  <!-- friends -->
  <div id="friends">
    <div id="searchfriend">

    </div>
    <div id="friendslist">
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>

    </div>
  </div>

  <!-- chat -->
  <div id="messages">
    <div id="chatmessages">



    </div>
    <div id="writemessage">

    </div>
  </div>
</div>

​

问题是，当我将输入元素添加到HTML代码中时，我设置的比率没有得到遵守，并且包含这些输入元素的flex项变得更大，我不希望发生这种情况。相同的HTML代码，但添加了输入元素：

https://codepen.io/thenr/pen/RwwweQN

​

#chat {
  display: flex;
  width: 100%;
  height: calc(100vh - 2em);
  overflow-y: hidden;
}

#friends {
  flex-grow: 2;
  display: flex;
  flex-direction: column;
  border: 1px solid black;
}

#messages {
  flex-grow: 5;
  display: flex;
  flex-direction: column;
  border: 1px solid black;
}

#searchfriend {
  flex-grow: 1;
  flex-shrink: 1;
  flex-basis: 120px;
  border: 1px solid black;
  background-color: blue;
}

#searchfriend input[type="text"] {
  margin: 0;
  padding: 1em;
  border: 0;
  border-radius: 0px;
  background-color: #d1d1d1;
}

#friendslist {
  flex-grow: 9;
  border: 1px solid black;
  overflow-y: auto;
}

.friend {
  height: 100px;
  border: 1px solid black;
}

#chatmessages {
  flex-grow: 5;
  border: 1px solid black;
}

#writemessage {
  flex-grow: 1;
  border: 1px solid black;
}

<div id="chat">
  <!-- friends -->
  <div id="friends">
    <div id="searchfriend">
      <input type="text" name="" id="searchtext" placeholder="Search friend...">

    </div>
    <div id="friendslist">
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>
      <div class="friend"></div>

    </div>
  </div>

  <!-- chat -->
  <div id="messages">
    <div id="chatmessages">



    </div>
    <div id="writemessage">
      <form action="" id="formchat">
        <input type="text" name="msgtext" id="msgtext" autocomplete="off">
        <button id="msgsend">Send</button>
      </form>
    </div>
  </div>
</div>

​

Answer 1

您可以使用flex简写flex:2 / flex: 5来代替flex-grow:2 / flex-grow:5。

它还可以避免设置flex-shrink和flex-basis。