如何使 MetroCSS 标签始终显示?

How to make MetroCSS label always shown?

有一个 input-control 有一个 label :

<div class="input-control modern text" data-role="input">
    <input name="salle_lib" id="salle_lib" type="text" maxlength="70" placeholder="libell&eacute;" data-validate-func="required" data-validate-hint="Ce champ est obligatoire"/>
    <button class="button helper-button clear"><span class="mif-cross"></span></button>
    <span class="label">libell&eacute;</span> // this is the label
</div>

MetroCSS 的默认行为是单击 input-control 时显示标签:

.input-control.text > .label {
  position: absolute;
  left: 0;
  top: -1rem;
  font-size: .875rem;
}
.input-control.modern input:focus ~ .label {
  opacity: 1;
  -webkit-transform: translateY(-18px);
          transform: translateY(-18px);
  transition: all 0.3s linear;
}

我希望即使未单击输入控件也始终显示此标签。我试过 $(".input-control.text").click(); 但没用!那么该怎么做呢?

这里是jsfiddle

关键是要用focus。我认识谁?因为你可以看到 css 的选择器是例如:.input-control.modern input:focus ~ .label

$('input').trigger('focus');
/* if you want to avoid the animation at the start

.modern.text * {
  transition:none !important;  
}

*/
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://metroui.org.ua/js/metro.js"></script>
<link href="http://metroui.org.ua/css/metro.css" rel="stylesheet">

<div class="input-control modern text " data-role="input">
    <input type="text" style="padding-right: 5px;">
    <span class="label">You login</span>
    <span class="informer">Please enter you login or email</span>
    <span class="placeholder" style="display: block;">Input login</span>
</div>

更新 演示:jsbin

只需将此 css 添加到您的页面

.input-control.modern input ~ .label {
    opacity: 1;
    transform: translateY(-18px);
    transition: all 0.3s linear 0s;
}