Assertion:
The DIR="RTL" attribute right aligns the content of INPUT elements WITHIN the form field, not the element itself relative to the viewport as it does for other elements.

Plain Input Type=Reset field, no value:
filler text filler text

Input Type=Reset field, no value, Dir=rtl:
filler text filler text

Plain Input Type=Reset field, value="This is a longer reset value example":
filler text filler text

Plain Input Type=Reset field, value="This is a longer reset value example", Dir=rtl:
filler text filler text