ECharts

Use this skill to build, audit, or fix Apache ECharts charts without turning the task into an option-reference lookup. Match the project's existing setup first; only introduce wrappers or new dependencies when the project has none.

Decision Tree

User task -> Does the project already use ECharts?
    - Yes -> Find existing chart components/helpers, reuse their init, theme,
             and resize patterns. Match import style (full vs echarts/core).
    - No -> Pick integration by framework:
        - React -> echarts-for-react wrapper, or a small hook around
                   init/dispose if the project avoids extra deps
        - Vue 3 -> vue-echarts wrapper, or composable around init/dispose
        - Vanilla / other -> echarts.init on a sized container