Floating labels - label above input field - css

Question

I'm working on an existing form, where I want to introduce floating labels.
A lot of the solutions I have seen on stack overflow are great, but require the label tag, to sit directly underneath the <input> tag. For example here.
On the form I'm working on though, my label tag, sits above the <input> tag. And the input tag, sits in a seperate div. (I am not allowed to move these tags around - please don't ask, restriction of the application!).
Is there anyway, I can achieve floating CSS labels, with this structure?
.test-field {
clear: both;
margin-bottom: 20px;
position: relative;
}
.test-field__input {
font-size: 0.875em;
line-height: 1;
-moz-appearance: none;
-webkit-appearance: none;
background-color: #f5f5f5;
border: 2px solid #eee;
border-radius: 4px;
color: grey;
height: calc((40 / 14) * 1em);
line-height: 1;
outline: 0;
padding: 0 8px;
vertical-align: top;
width: 100%;
}
/* // FOCUS */
.test-field__input:focus,
.test-field__input ~ input:checked:focus {
border-color: #5d7199;
}
/* // DISABLED */
.test-field--disabled .test-field__input {
background-color: #e8e8e3;
cursor: not-allowed;
}
.test-field--disabled .test-field__flag, .test-field--disabled .test-field__label {
color: #d0d0cb;
}
/* // ERROR */
.test-field--error .test-field__input, .test-field--error .test-field__selection .atc-field__input {
border-color: #ff4436;
color: #ff4436;
}
/* // FLOATING LABEL */
.test-field--floating .test-field-input {
position: relative;
margin-bottom: 1.5rem;
}
.test-field__label {
position: absolute;
top: 0;
padding: 7px 0 0 13px;
transition: all 200ms;
opacity: 0.5;
}
.test-field__input:focus + .test-field__label,
.test-field--floating .test-field__input:valid + .test-field__label {
font-size: 75%;
transform: translate3d(0, -100%, 0);
opacity: 1;
}
<div class="test-field test-field--floating">
<label for="a" class="test-field__label">Input label</label>
<input class="test-field__input" id="b" type="text" value="" required>
</div>

Answer 1

This seemed to be a good way to replicate floating labels, with a similar DOM structure:
const floatField = document.querySelectorAll('.ej-form-field-input-textbox');
const floatContainer = document.querySelectorAll('.ej-form-field');
for (let i = 0; i < floatField.length; i++) {
floatField[i].addEventListener('focus', () => {
floatContainer[i].classList.add('active');
});
};
for (let i = 0; i < floatField.length; i++) {
floatField[i].addEventListener('blur', () => {
floatContainer[i].classList.remove('active');
});
};
.ej-form-field {
border: solid 1px #ccc;
padding: 0 8px;
position: relative;
}
.ej-form-field input {
border: 1px solid red;
font-size: 16px;
outline: 0;
height: 30px;
/* padding: 16px 0 10px; */
}
label {
font-size: 16px;
position: absolute;
transform-origin: top left;
transform: translate(0, 16px) scale(1);
transition: all .1s ease-in-out;
height: 40px;
}
.ej-form-field.active label {
transform: translate(0, -6px) scale(.95);
color: red;
margin-left: 10px;
background-color: #fff;
border: 1px solid green;
height: 20px;
}
<div id="floatContainer" class="ej-form-field">
<label for="floatField">First name</label>
<div>
<input id="floatField" class="ej-form-field-input-textbox" type="text">
</div>
</div>
<div id="floatContainer" class="ej-form-field">
<label for="floatField">Last name</label>
<div>
<input id="floatField" class="ej-form-field-input-textbox" type="text">
</div>
</div>