[GitHub] [echarts] hughess commented on issue #18622: [Bug] Need y-axis information in params for tooltip formatter

["hughess (via GitHub)" <gi...@apache.org>]

hughess commented on issue #18622:
URL: https://github.com/apache/echarts/issues/18622#issuecomment-1546880350

   Sorry, my example doesn’t do a great job of showing the problem. The reason I can’t use the series to determine the format is I’m building a library on top of echarts, so I need to create a generalized formatter function that can be used in any situation. For the axis labels, I have access to the series information before generating the chart, so I can supply the formatting that the user sets for each column. 
   
   Unfortunately, for tooltips I can’t access that same information because it’s triggered from the client.
   
   I might be able to use the series name to look up what the correct format is, but there is one other issue with that: we show our series names as formatted versions of column names (e.g., sales_usd —-> Sales ($) ). Ideally, I would look up the format using the series column name (sales_usd), but the only information I have access to in params is the formatted name. I haven’t been able to figure out how to set a separate series name and ID in a way that will be accessible in the tooltip formatter.
   
   For reference, here is the feature I am looking to implement where this is an issue: 
   https://github.com/evidence-dev/evidence/issues/412


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