To summarize the date inputs problem:
- You have to display them (i.e. avoid display:none) otherwise the input UI will not be triggered ;
- a placeholder is contradictory with them (as per the spec, and because they have to display a specific UI) ;
- converting them to another input type for the unfocused time do allows placeholders, but focus then triggers the wrong input UI (keyboard), at least for a small time, because focus events cannot be cancelled.
- inserting (before) or adding (after) content doesn't prevent the date input value to be displayed.
The solution I found to meet those requirements is to use the usual trick to style native form elements : ensure the element is displayed but not visible, and display its expected style through its associated label. Typically, the label will display as the input (including a placeholder), but over it.
So, an HTML like:
<div class="date-input>
<input id="myInput" type="date">
<label for="myInput">
<span class="place-holder">Enter a date</span>
</label>
</div>
Could be styled as:
.date-input {
display: inline-block;
position: relative;
}
/* Fields overriding */
input[type=date] + label {
position: absolute; /* Same origin as the input, to display over it */
background: white; /* Opaque background to hide the input behind */
left: 0; /* Start at same x coordinate */
}
/* Common input styling */
input[type=date], label {
/* Must share same size to display properly (focus, etc.) */
width: 15em;
height: 1em;
font-size: 1em;
}
Any event (click, focus) on such an associated label will be reflected on the field itself, and so trigger the date input UI.
Should you want to test such a solution live, you can run this Angular version from your tablet or mobile.