The Chart.helpers.each method uses Object.keys() to iterates on the object *own enumerable properties*, meaning that checking if object.hasOwnProperty() is useless.
Fix color animation because the color lib changed the `mix` implementation to match SASS behavior, so the weight specifies the amount of the first color that should be included in the returned color.
The core.helpers file was failing linting checks as the global CanvasPattern was not defined. Added the `/* global CanvasGradient */` statement to make linting pass. Updates chartjs/Chart.js#1323
On branch feature_New_plugin_interface_afterScaleUpdate
Changes to be committed:
modified: dist/Chart.bundle.js
modified: dist/Chart.bundle.min.js
#On branch feature_New_plugin_interface_afterScaleUpdate
#Changes to be committed:
When a hover background isn't specified in the config for a chart a modified version of the default color is used. If the background color is a CanvasPattern object an error is triggered.
With this change the default background color will no longer be modified if it is a CanvasPattern.
New Chart.Element.hidden bool flag storing the visibility state of its associated data. Since elements belong to a specific chart, this change allows to manage data visibility per chart (e.g. when clicking the legend of some charts).
This commit also changes (fixes?) the polar chart animation when data visibility changes. Previous implementation was affected by an edge effect due to the use of NaN as hidden implementation.
Introduced a new meta.hidden 3 states flag (null|true|false) to be able to override dataset.hidden when interacting with the chart (i.e., true or false to ignore the dataset.hidden value). This is required in order to be able to correctly share dataset.hidden between multiple charts.
For example: 2 charts are sharing the same data and dataset.hidden is initially false: the dataset will be displayed on both charts because meta.hidden is null. If the user clicks the legend of the first chart, meta.hidden is changed to true and the dataset is only hidden on the first chart. If dataset.hidden changes, only the second chart will have the dataset visibility updated and that until the user click again on the first chart legend, switching the meta.hidden to null.
Dataset effective type is now stored under meta.type, allowing many charts to share the same dataset but with different types. Also move dataset.bar flag to meta.bar.
Meta info are now scoped by chart and moved under the dataset._meta map { chart.id -> meta }. Meta for a specific chart (and dataset) can be accessed using chart.getDatasetMeta(datasetIndex) or from the dataset controller using getMeta(). Note that helpers.uid() now generates an int (instead of a string) to make lookups in the _meta map faster.
