输入控件浮动占位符保持验证状态

Question

我正在尝试实现浮动占位符功能。使用我编写的代码一切正常，除了当有一个电子邮件字段并且我尝试添加一个不是电子邮件格式的错误条目并且我从输入框移动焦点时，浮动文本仍然出现。您可以查看

Belew是我的代码： -

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.-input-container {
    max-width: 540px;
    padding-bottom: 30px;
    margin-top: 30px;
}

input.-textbox {
    width: 100%;
    border-radius: 40px;
    background-color: #f5f5f5;
    border: 1px solid #dddddd;
    padding: 16px 30px;
    font-size: 16px;
    color: #555555;
    font-family: OpenSans;
    font-weight: normal;
    font-style: normal;
    font-stretch: normal;
    line-height: 1.88;
    letter-spacing: normal;
    text-align: left;
}

input.-textbox:focus{
    outline: none;
    box-shadow: none
}

input.-textbox:focus ~ .floating-label,
input.-textbox:not(:focus):valid ~ .floating-label {
  top: 8px;
  bottom: 10px;
  left: 45px;
  font-size: 10px;
  opacity: 1;
  line-height: 2.1;
  font-family: OpenSans;
}

input.-textbox ~ .floating-label {
  position: absolute;
  pointer-events: none;
  left: 45px;
  top: 18px;
  transition: 0.2s ease all;
}

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<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.0/css/bootstrap.css" rel="stylesheet"/>
<div class="-input-container col-xl-6 col-lg-6 col-md-12 col-sm-12 col-12 ">
  <input type="email" class="-textbox form-control" required="">
  <span class="floating-label">E-postadress</span>
</div>

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Answer 1

试试这个：

.-input-container {
    max-width: 540px;
    padding-bottom: 30px;
    margin-top: 30px;
}

input.-textbox {
    width: 100%;
    border-radius: 40px;
    background-color: #f5f5f5;
    border: 1px solid #dddddd;
    padding: 16px 30px;
    font-size: 16px;
    color: #555555;
    font-family: OpenSans;
    font-weight: normal;
    font-style: normal;
    font-stretch: normal;
    line-height: 1.88;
    letter-spacing: normal;
    text-align: left;
    &:focus{
      outline: none;
      box-shadow: none
    }
}

<div class="-input-container col-xl-6 col-lg-6 col-md-12 col-sm-12 col-12 ">
  <input type="email" class="-textbox form-control" placeholder="E-postadress" required="">
</div>

Answer 2

在其中使用javascript。试试这个

.-input-container {
  max-width: 540px;
  padding-bottom: 30px;
  margin-top: 30px;
}

input.-textbox {
  width: 100%;
  border-radius: 40px;
  background-color: #f5f5f5;
  border: 1px solid #dddddd;
  padding: 16px 30px;
  font-size: 16px;
  color: #555555;
  font-family: OpenSans;
  font-weight: normal;
  font-style: normal;
  font-stretch: normal;
  line-height: 1.88;
  letter-spacing: normal;
  text-align: left;
}

input.-textbox:focus {
  outline: none;
  box-shadow: none
}

input.-textbox:focus~.floating-label,
input.-textbox:not(:focus):valid~.floating-label, {
  top: 18px;
  bottom: 10px;
  left: 45px;
  font-size: 10px;
  opacity: 1;
  line-height: 2.1;
  font-family: OpenSans;
}

input.-textbox~.floating-label {
  position: absolute;
  pointer-events: none;
  left: 45px;
  top: 18px;
  transition: 0.2s ease all;
}
.test2{
 margin-top:-20px;
 line-height:2.1;
 font-size:10px;
  font-family: OpenSans;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.0/css/bootstrap.css" rel="stylesheet" />
<div class="-input-container col-xl-6 col-lg-6 col-md-12 col-sm-12 col-12 ">
  <input type="email" class="-textbox form-control" required="" id=spa>
  <span class="floating-label">E-postadress</span>
</div>

2.0.1

Answer 3

一些Javascript和样式的细微变化很简单。试试这个。

$(document).ready(function () {
    $('.-textbox').click(function (){
        $(this).siblings('span').addClass('active');
    });
    $('.-textbox').blur(function(){
        if($('.-textbox').val()=== ''){
            $(this).siblings('span').removeClass('active');
        }
    });
});

.-input-container {
    max-width: 540px;
    padding-bottom: 30px;
    margin-top: 30px;
    position: relative;
}

input.-textbox {
    width: 100%;
    border-radius: 40px;
    background-color: #f5f5f5;
    border: 1px solid #dddddd;
    padding: 16px 30px;
    font-size: 16px;
    color: #555555;
    font-family: OpenSans;
    font-weight: normal;
    font-style: normal;
    font-stretch: normal;
    line-height: 1.88;
    letter-spacing: normal;
    text-align: left;
    &:focus{
        outline: none;
        box-shadow: none
    }
}
input.-textbox ~ .floating-label {
    position: absolute;
    pointer-events: none;
    left: 45px;
    top: 18px;
    transition: 0.2s ease all;
}
input.-textbox ~ .floating-label.active{
    top: 8px;
    bottom: 10px;
    left: 45px;
    font-size: 10px;
    opacity: 1;
    line-height: 2.1;
    font-family: OpenSans;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="-input-container col-xl-6 col-lg-6 col-md-12 col-sm-12 col-12 ">
    <input type="email" class="-textbox form-control" required="">
    <span class="floating-label">E-postadress</span>
</div>