CSS专注于子元素更改父元素 [英] CSS focus on child element change a parent element

问题描述

我想设置一个样式，该样式在form字段内具有标签和输入，并且当我在输入内写一些东西(可能带有焦点)时，我希望边框以蓝色点亮.现在我有这样的东西:

I want to style a form that has the label and input inside the form field and when I'll write something inside the input (probably with focus), I want the borders to light up with some blue. Now I have something like this:

HTML

<div class="login-form-field">
  <label for="email" class="login-form-label">Email:</label>
  <input class="login-form-input" autofocus="autofocus" type="email" value="" name="user[email]" id="user_email">
</div>

CSS

.login-form-input{
  margin-left: 20px;
  width: 90%;
  outline: none;
  border: none;
  -webkit-box-shadow: none;
  -moz-box-shadow: none;
  box-shadow: 0 0 0px 1000px white inset;
}
.login-form-label {
  font-size: 13px;
  font-weight: 300;
  padding-left: 20px;
}
.login-form-field{
  width: 100%;
  border-radius: 0px;
  height: 6rem;
  border: 0.5px solid grey;
  box-shadow: 0px 0px 0px;
}

我已经试图选择父母进行一些更改，以及在Google上找到的其他内容.我得到的最接近的颜色是:当鼠标悬停在:hover上时，用蓝色突出显示，但是我需要保持颜色不变，就像选择输入时一样.

I already tried to select the parent to made some change and other stuff I found on google. The closest I got was to highlight with blue when the mouser was over it with :hover, but i need the color to stay as I'm with the input selected.

.login-form-field:hover {
  border-color: blue !important;
}

这是 JSFiddle ，如果有人可以帮助我，我将不胜感激！

Here is the JSFiddle, if anyone could help I would be grateful!

推荐答案

与jquery进行反应:

React with jquery:

$( document ).ready(function() {
    console.log( "ready!" );

    $('.login-form-input').focus(function() {
         $(this).parent().css( "border", "#99f 2px solid" );
    });

    $('.login-form-input').focusout(function() {
         $(this).parent().css( "border", "" );
    });

});

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