Background
Result of spike T369863. Right now it's possible to create a line chart without any legend.
e,g.
{{#chart:1993 Canadian federal election.chart|data=1993 Canadian federal election.tab}}produces:
which has no legend/key explaining the meaning of the lines.
User story
As a reader I want to be able to the understand the graph I see.
Requirements
- It should be possible to identify different series on a chart with more than one series of data.
- A legend should be required on a chart with more than one series of data.
BDD
- For QA engineer to fill out
Test Steps
- For QA engineer to fill out
Design
Legend styling is defined in T375235.
Acceptance criteria
- Add acceptance criteria
Communication criteria - does this need an announcement or discussion?
- Add communication criteria
Rollback plan
- What is the rollback plan in production for this task if something goes wrong?
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