How to set initial indicator when this color picker starts?

[fourmisz]

I wanna know how to set indicator's position when it starts like this.

I know setHex function but it doesn't change indicator.

I definetely changed the color but it didn't changed. please help me how to change it or how to fix it.

[KSVQ]

I have the same question

when I use the presented example

ColorPicker(
    document.getElementById('slider'), 
    document.getElementById('picker'), 
            function(hex, hsv, rgb, pickerCoordinate, sliderCoordinate) {

                    ColorPicker.positionIndicators(
                        document.getElementById('slider-indicator'),
                        document.getElementById('picker-indicator'),
                        sliderCoordinate, pickerCoordinate
                    );
            });

it throws error TypeError: this.slideElement is null