Doesn't using the gov.uk article work fine for issues 1, 2, and 4? <input required type="text" inputmode="numeric" pattern="-?[0-9]+" title="Integers only"

Doesn't using the gov.uk article work fine for issues 1, 2, and 4? <input required type="text" inputmode="numeric" pattern="-?[0-9]+" title="Integers only" /> <input required type="text" inputmode="numeric" pattern="-?([0-9]+|[0-9]*\.[0-9]+)?" title="Decimal numbers only" /> <input required type="text" inputmode="numeric" pattern="[0-9]*(\.[0-9]+)?" title="Positive decimal numbers only" />