[Doc] Zoom Slider background color missing definition in Documentation

[hzyniecki]

What problem does this feature solve?

zoom slider documentation misses the capability to define backgroundColor variable in the textStyle object even though the capability is present. Example of usage is below.

  textStyle: {
    backgroundColor: '#fff',
  },

https://echarts.apache.org/en/option.html#dataZoom-slider.textStyle

What does the proposed API look like?

N/A

[helgasoft]

yes, there are missing properties in the documentation repo.
Here are some other examples:

• textStyle missing backgroundColor
• toolbox missing backgroundColor
• dataZoom-slider missing dataBackgroundColor (legacy)
• pie.label missing textStyle
• tree.data missing 'children' property

[Justin-ZS]

Opened apache/echarts-doc#516 to cover the confirmed missing docs. @hzyniecki @helgasoft please take a look when you have a chance.

[helgasoft]

Thank you, @Justin-ZS.
While at it, here are a few more missing parameters:

• all series 'datasetId' - already mentioned in #284
• grid.opacity (as in grid:{show:true, backgroundColor:'red', opacity:0.5})
• series.tooltip.trigger
• series-bar.encode.label
• graph/sankey data/links show:true https://echarts.apache.org/en/option.html#series-graph.data.tooltip
• candlestick.markArea.label.formatter
• scatter.markArea.data.0.label.formatter
• sankey.data.label.formatter
• series.custom 'label'
• series.custom 'style.rich' is supported, but missing from API, [Feature] 添加自定义组件中，基于富文本格式的文字超长截断和换行功能 #19714
• heatmap 'dimensions' missing but works for dataset instead of encode =bug [Bug] 'encode' fails in heatmap series with calendar coordinate system. dimensions works instead #20748
• pie.encode.itemName missing;   pie.label.silent:true;   pie.label.show default is true, not false

[Justin-ZS]

Updated apache/echarts-doc#516 with the confirmed docs gaps, including toolbox.backgroundColor, dataZoom-slider.textStyle, series-tree.data.children, datasetId, grid.opacity, series.tooltip.trigger, encode.label, encode.itemName, graph/sankey tooltip.show, sankey label.formatter, custom text style.rich, heatmap.dimensions, and the pie label fixes.

Left out items that are unsupported, deprecated, already generated, or runtime issues: top-level textStyle.backgroundColor, dataZoom-slider.dataBackgroundColor, pie.label.textStyle, series.custom.label, the markArea formatters, and #20748's heatmap encode behavior.

@hzyniecki @helgasoft please review when convenient.