Alignment of horizontal grid lines and tick text is off

[Kilian]

Visually, the tick text and the horizontal gridlines are not vertically centered, which makes the axis look slightly-off. This is already noticeable in the line chart demos:

If you zoom in on this image, you can see it more clearly:

What I would expect is vertical alignment of the tick text (regardless of font-size) with the grid lines. In the above example, the ticks would need to be moved 2px up to get the following alignment (left: new position, right: overlayed on current position):

[etpinard]

I suspect that off-center offset is on purpose. Though it would be nice to add an axis attribute (e.g. yaxis.ticktextoffset) to make this configurable.

[alexcjohnson]

I don't think it's on purpose; I know that for log axes we fiddle with the positioning of individual labels (particularly to keep the small 9 from interfering with the bigger 10^n) but I suspect for linear it's just us making a poor approximation to avoid having to calculate bounding boxes individually for each tick label. I'd be happy to consider this a bug.

That said there are use cases for offsetting the labels - but perhaps this would be best handled as an anchor (top/middle/bottom, or left/center/right for x axes) rather than a pixel offset?

Like this Vox chart:

[alexcjohnson]

Closed by #1854

[CrackedBeefcake]

i have the same issue.

[alexcjohnson]

@FinnFrotscher this issue was about alignment of tick labels with their own gridlines - which to my eye looks good in the image you posted... perhaps you're concerned about the ranges of your two y axes being mismatched? Like #1962 perhaps? Can you clarify what you're interested in?

[CrackedBeefcake]

I am refering to the horizontal alignment of the barchart and linechart.
the 0-line of the line is higher then the 0-line of the bars.

[etpinard]

@FinnFrotscher see #1775 (comment) for explanations.

[alexcjohnson]

I am refering to the horizontal alignment of the barchart and linechart. the 0-line of the line is higher then the 0-line of the bars.

That's a separate issue. You have two autoranged axes, one with bars (so it doesn't pad the axis past zero unless you have negative bars) and one with a line (so it always pads the axis vertically). If you want the right-side axis to behave like the left, you can do something like yaxis2: {rangemode: 'tozero'} which forces the axis autorange to reach down to zero, but also won't go past it unless there's actually negative data.

[CrackedBeefcake]

thank you, my issue is resolved. sorry for posting it in the wrong issue.