Animate parent div when an input is focused

问题

I am trying to make it so when someone clicks on the input box it rises to the top of the screen. I am able to make this work but I can't the other content within the parent div to move with it. Here is what I have:

container{

} 
input#search-bar:focus{
  position: absolute;
  border: 1px solid #008ABF;
  transition: 0.35s ease;
  color: #008ABF;
  margin-top: -10px;
}

<div class="container">
  <div class="brandHeader">
    <h1>My Header</h1>
  </div>
  <form class="formHolder">
    <input type="text" id="search-bar" placeholder="Search">
  </form>
</div>

What I want is My Header to also move up 10px at the same time as the search bar.

If you need any additional information that I forget to provide please ask and I will post it.

回答1:

A Pure CSS Solution - Flexbox Order

If you are able to restructure your html a little it's possible by changing the dom so input is 1st in the html but 2nd on screen. This method uses flexbox order to do so.

Here's an example.

.container {
  display: flex;
  flex-direction: column;
}
input {
  display: flex;
  flex-direction: column;
  order: 2;
}
.brandHeader {
  display: flex;
  order: 1;
  transition: all 0.2s ease;
}
input:focus + .brandHeader {
  margin-top: -10px;
}

<form class="container">
  <input type="text" id="search-bar" placeholder="Search">
  <div class="brandHeader">
    <h1>My Header</h1>
  </div>
</form>

fiddle

https://jsfiddle.net/Hastig/djj01x6e/

If that would work for you let me know and I'll explain more about it.

A 2nd Pure CSS Solution - flex-direction: column-reverse

Pretty much the same as the first but no need to use order: x;

.container {
  display: flex;
  flex-direction: column-reverse;
} 
input {
  display: flex;
  flex-direction: column;
 }
.brandHeader {
  display: flex;
  transition: all 0.2s ease;
}
input:focus + .brandHeader {
 margin-top: -10px;
}

<form class="container">
    <input type="text" id="search-bar" placeholder="Search">
    <div class="brandHeader">
      <h1>My Header</h1>
    </div>
</form>

fiddle

https://jsfiddle.net/Hastig/djj01x6e/1/

You can do a similar thing without flexbox using position: absolute to keep input 1st in dom but 2nd on screen but it too depends on your being able to change html structure.

回答2:

You can toggle or addClass to brandHeader on input:focus with jQuery, then you can add the transition to both h1 and input

来源：https://stackoverflow.com/questions/39157356/animate-parent-div-when-an-input-is-focused

标签

html

css3

css-animations