Use `arcTo` instead of `quadraticCurveTo` (both methods have the same compatibility level) because it generates better results when the final rect is a circle but also when it's actually a rectangle and not a square. This change is needed by the datalabels plugin where the user can configure the `borderRadius` and thus generate circle from a rounded rectangle.
* added 'angle' option to polar charts. image comparison test is work in progress; not currently passing
* removed unnecessary variable assignment
* code cleanup based on PR; for 'angle' option on polarCharts
* Made polar chart image comparison test pass by removing debug flag. Also explicitly marked _computeAngle as private.
* Removed visibleCount computation in polar chart
* split out code related to updating the radius in polar chart's update function, into it's own 'updateRadius' function
* made updateRadius method private
* fix linting error
* updated polar charts to read custom angles from "chart.options.elements.arc.angle" instead of "chart.options.angle"
When the chart is responsive to the parent container, the calculations for padding assumes that the figure is in pixels so that 20% is taken to be 20 (pixels), which results in the chart exceeding the parent container. This appears to be an IE11 only issue.
* Bugfix: Improve polyfill function of log10 to return whole powers of 10
as integer values, as it caused endless loop in IE11 in the tick
creation loop.
* Compare floating-point numbers directly instead of using unnecessary division.
Setup a new Heroku app based on rauchg/slackin, using Slack legacy token from the Chart.js (chartjs.slack@...) user and reCAPTCHA from the same Google account.
Cached plugin descriptors hold a reference on the plugin options, which break if the plugin options object is replaced. That case happens when the user updates the plugin options with a new object, but also since the new config update logic (#4198) that now always clones the plugin options. The fix consists in explicitly invalidating that cache before updating the chart.
`gitbook-cli install` failed when trying to fetch eslint-config-chartjs because of the way it was installed (ie. using the GitHub repository URL). The shared config is now published on npmjs: https://www.npmjs.com/package/eslint-config-chartjs
Chart.layouts seems more consistent with other service names (Chart.plugins, Chart.scales, etc.) but also more inline with the service which handle many layout (one per charts).
