No label:
Only a placeholder:
Not really a label, just text in a span next to the text:
A label, but not attached to the input
Proper label/input relation:
Proper label/input relation plus a placeholder:
Implicit label:
<label for="colour5">What's your favourite colour? <input type="text" id="colour5" name="colour"> </label>
<input type="text" id="size" name="size" aria-label="Size" placeholder="Size">
Use an aria-label (not preferred)
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