keyboard event doesn't properly handle input selection for decimal numbers

[changhuixu]

For an input element,

<input
      id="dollar-amount"
      type="text"
      name="dollar-amount"
      inputmode="numeric"
      pattern="^(?=.*\d)\d*(\.\d{1,2})?$"
      placeholder="0.00"
      digitOnly
      decimal="true"
    />

If enter 1.35, select all, then enter .25. The input box will have value 25, which is not correct.