(v3.0.0-rc) defaults are overriding chart configuration

[santam85]

Expected Behavior

I am setting some defaults (both scripted and static) for a few parameters, but for one particular chart I want to override them. I expect the default values will not be used for a specific chart if I add explicit values in the chart configuration.

Current Behavior

The chart dataset configuration seems to be ignored, and the defaults are used. If I remove the defaults, the chart configuration is applied.

Possible Solution

not sure, but possibly related to changes done in #8374 ?

Steps to Reproduce

https://codepen.io/santa-85/pen/BaQgqYe

Environment

• Chart.js version: since 3.0.0-beta.13
• Browser name and version:
• Link to your project:

[kurkle]

A generic backgroundColor is not overriding a type specific pointBackgroundColor. It is working as designed.

To get that use case working, you should define the point defaults in defaults.elements.point, or you should use the pointBackgroundColor in the options to override that default.

I really dislike the prefixed option names overall, but there is a proper use case for those in a line chart when avoiding scriptable options (for performance)

[santam85]

Ok, this used to work before the options prefixes were changed, I guess that namespacing them in the dataset was not the right fix for my use-case? Are you suggesting i remove point from my defaults?

According to https://www.chartjs.org/docs/master/general/options/#dataset-level-options this should be working, as the order should be defaults.datasets[dataset.type] before defaults.elements[elementType]

[santam85]

Removed point defaults.