像Whatsapp一样,如何在输入时进行向上扩展的输入? [英] Like Whatsapp, how to make an input that extends to upwards as you type?
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问题描述
就像在Whatsapp中一样,我想创建一个向上增长的写作领域.
Like in Whatsapp, I want to make a writing field that grows upwards.
我有以下代码.
* {
box-sizing: border-box;
}
body {
margin: 0;
padding: 0;
background: #262626;
}
.tel {
margin: 20px auto 0;
width: 300px;
height: 500px;
background: #fff;
border-radius: 20px;
position: relative;
}
.tel .screen {
width: 280px;
height: 400px;
background: url("https://user-images.githubusercontent.com/15075759/28719144-86dc0f70-73b1-11e7-911d-60d70fcded21.png");
left: 50%;
position: absolute;
top: 50px;
transform: translate(-50%, 0);
}
.tel .screen .nav {
width: 100%;
position: absolute;
top: 0;
left: 0;
height: 50px;
background: #075E54;
}
.tel .screen #inp {
position: absolute;
left: 6px;
bottom: 6px;
width: 225px;
min-height: 37px;
border-radius: 50px;
border: none;
outline: none;
font-size: 14px;
padding: 2px 10px;
resize: none;
}
.tel .screen #inp::-webkit-scrollbar {
width: 0;
height: 0;
}
.tel .screen .voice {
position: absolute;
right: 6px;
bottom: 6px;
background: #00897B;
height: 37px;
width: 37px;
border-radius: 50%;
display: flex;
justify-content: center;
align-items: center;
}
.tel .speaker {
width: 50px;
height: 4px;
background: #a0a0a0;
position: absolute;
left: 50%;
transform: translate(-50%, 0);
top: 25px;
border-radius: 2px;
}
.tel .touch {
height: 30px;
width: 30px;
position: absolute;
left: 50%;
transform: translateX(-50%);
background: conic-gradient(#b3b3b3 0%, #a0a0a0 50%, #b3b3b3 50%, #a0a0a0 100%);
border-radius: 50%;
bottom: 10px;
}
i {
color: #fff;
font-size: 14px;
}
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<div class="tel">
<div class="speaker"></div>
<div class="screen">
<div class="nav"></div>
<textarea type="text" id="inp"></textarea>
<div class="voice">
<i class="material-icons">keyboard_voice</i>
</div>
</div>
<div class="touch"></div>
</div>
推荐答案
我将使用一个contenteditable
div,您只需将其放在底部,它的行为将与预期的一样
I would use a contenteditable
div that you simply put at the bottom and it will behave like expected
* {
box-sizing: border-box;
}
body {
margin: 0;
padding: 0;
background: #262626;
}
.tel {
margin: 20px auto 0;
width: 300px;
height: 500px;
background: #fff;
border-radius: 20px;
position: relative;
}
.tel .screen {
width: 280px;
height: 400px;
background: url("https://user-images.githubusercontent.com/15075759/28719144-86dc0f70-73b1-11e7-911d-60d70fcded21.png");
left: 50%;
position: absolute;
top: 50px;
transform: translate(-50%, 0);
}
.tel .screen .nav {
width: 100%;
position: absolute;
top: 0;
left: 0;
height: 50px;
background: #075E54;
}
.tel .screen #inp {
position: absolute;
left: 6px;
bottom: 6px;
width: 225px;
min-height: 37px;
border-radius: 50px;
border: none;
outline: none;
font-size: 14px;
padding: 2px 10px;
}
.tel .screen .voice {
position: absolute;
right: 6px;
bottom: 6px;
background: #00897B;
height: 37px;
width: 37px;
border-radius: 50%;
display: flex;
justify-content: center;
align-items: center;
}
.tel .speaker {
width: 50px;
height: 4px;
background: #a0a0a0;
position: absolute;
left: 50%;
transform: translate(-50%, 0);
top: 25px;
border-radius: 2px;
}
.tel .touch {
height: 30px;
width: 30px;
position: absolute;
left: 50%;
transform: translateX(-50%);
background: conic-gradient(#b3b3b3 0%, #a0a0a0 50%, #b3b3b3 50%, #a0a0a0 100%);
border-radius: 50%;
bottom: 10px;
}
i {
color: #fff;
font-size: 14px;
}
div.edit {
position: absolute;
bottom: 4px;
left: 5px;
right: 50px;
padding: 10px;
min-height: 40px;
background: #fff;
border-radius: 15px;
}
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<div class="tel">
<div class="speaker"></div>
<div class="screen">
<div class="nav"></div>
<div contenteditable="true" class="edit"></div>
<div class="voice">
<i class="material-icons">keyboard_voice</i>
</div>
</div>
<div class="touch"></div>
</div>
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