Placeholder for contenteditable div

I have the following: FIDDLE

The placeholder works fine and dandy until you type something, ctrl + A, and delete. If you do that, the placeholder disappears and never shows up again.

What's wrong? How can I have a placeholder for a contenteditable div?

HTML:

<div class="test" placeholder="Type something..." contenteditable="true"></div>

.test {
    width: 500px;
    height: 70px;
    background: #f5f5f5;
    border: 1px solid #ddd;
    padding: 5px;
}

.test[placeholder]:empty:before {
    content: attr(placeholder);
    color: #555; 
}

While searching for the same problem I worked out a simple mixed css-JavaScript solution I'd like to share:

CSS:

[placeholder]:empty::before {
    content: attr(placeholder);
    color: #555; 
}

[placeholder]:empty:focus::before {
    content: "";
}

JavaScript:

jQuery(function($){
    $("[contenteditable]").focusout(function(){
        var element = $(this);        
        if (!element.text().trim().length) {
            element.empty();
        }
    });
});

Updated fiddle

from Placeholder in contenteditable - focus event issue

[contenteditable=true]:empty:not(:focus):before{
  content:attr(data-ph);
  color:grey;
  font-style:italic;
}

I've created a live demo: "Placeholder for content-editable divs", by HTML & CSS.
Also, Codepen: https://codepen.io/fritx/pen/NZpbqW
Ref: https://github.com/fritx/vue-at/issues/39#issuecomment-504412421

.editor {
  border: solid 1px gray;
  width: 300px;
  height: 100px;
  padding: 6px;
  overflow: scroll;
}
[contenteditable][placeholder]:empty:before {
  content: attr(placeholder);
  position: absolute;
  color: gray;
  background-color: transparent;
}

<textarea class="editor"
  placeholder="Textarea placeholder..."
></textarea>
<br/>
<br/>
<div class="editor"
  contenteditable
  placeholder="Div placeholder..."
  oninput="if(this.innerHTML.trim()==='<br>')this.innerHTML=''"
></div>

I got this solution from: https://codepen.io/flesler/pen/AEIFc

Basically put this css code:

[contenteditable=true]:empty:before{
  content: attr(placeholder);
  pointer-events: none;
  display: block; /* For Firefox */
}

And have the placeholder attribute in your contenteditable div.