javascript - How to Calculate OffsetLeft from parent excluding parent's left padding & border -

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is there easy way calculate offsetleft direct parent, excluding padding , border width of parent?

when this, returned value includes left border , padding width of parent.

child.offsetleft - parent.offsetleft

jsfiddle

i know can subtract left border+padding width of parent, means must use getcomputedstyle retrieve values, strip 'px' , convert int, subtract... isn't there better?

look commented. wrote offsetleft property of each element doesnt not include border of offsetparent 2 exceptions wrote, here offsetparent document.body each element. calculation goes

child.offsetleft - parent.offsetleft - parent.clientleft -     parseint(getcomputedstyle(parent).paddingleft)

because difference of 2 offsetleft properties including parent border.


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