How to make type="number" to positive numbers only

I have found another solution to prevent negative number.

<input type="number" name="test_name" min="0" oninput="validity.valid||(value='');">

Add a min attribute

<input type="number" min="0">

It depends on how precise you want to be. It you want to accept only integers, than:

<input type="number" min="1" step="1">

If you want floats with, for example, two digits after decimal point:

<input type="number" min="0.01" step="0.01">