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Replace Apex charts with Apache eCharts#2544

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ChrisPaulBennett:echarts-test
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Replace Apex charts with Apache eCharts#2544
ChrisPaulBennett wants to merge 10 commits into
cylc:masterfrom
ChrisPaulBennett:echarts-test

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@ChrisPaulBennett ChrisPaulBennett commented May 6, 2026

Apex Charts has changed it's licensing so we need to pivot to a different charting library.
Apache eCharts seems like a good fit for us. It uses the Apache 2.0 licence (https://www.apache.org/licenses/LICENSE-2.0.html).
This started of a play branch to see if it meets our requirements which has gone very well.
This PR closes #2256 and closes #2406

Check List

  • I have read CONTRIBUTING.md and added my name as a Code Contributor.
  • Contains logically grouped changes (else tidy your branch by rebase).
  • Does not contain off-topic changes (use other PRs for other changes).
  • Applied any dependency changes to both setup.cfg (and conda-environment.yml if present).
  • Tests are included (or explain why tests are not needed).
  • Changelog entry included if this is a change that can affect users
  • Cylc-Doc pull request opened if required at cylc/cylc-doc/pull/XXXX.
  • If this is a bug fix, PR should be raised against the relevant ?.?.x branch.

@ChrisPaulBennett ChrisPaulBennett self-assigned this May 6, 2026
@MetRonnie MetRonnie added this to the 2.x milestone May 6, 2026
@MetRonnie MetRonnie added dependencies Pull requests that update a dependency file javascript Pull requests that update Javascript code labels May 18, 2026
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apex charts: licence issues gantt: view goes blank with excessive scrolling

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