Function getMousePosition

src/default_theme/assets/split.js:256–259

(e)

        // Supports touch events, but not multitouch, so only the first
        // finger `touches[0]` is counted.
        function getMousePosition(e) {
            if ('touches' in e) { return e.touches[0][clientAxis] }
            return e[clientAxis]
        }

        // Actually adjust the size of elements `a` and `b` to `offset` while dragging.
        // calc is used to allow calc(percentage + gutterpx) on the whole split instance,