# `mix livepanels.check`
[🔗](https://github.com/livepanels/livepanels/blob/v0.1.0/lib/mix/tasks/livepanels.check.ex#L1)

Validates LivePanels canvas `on_mount` declarations in the current Mix app.

    mix livepanels.check

The task compiles the application, finds LiveViews that use
`LivePanels.Canvas`, and runs the same runtime config builder the canvas uses
during mount. This gives projects an explicit check for malformed runtime
options without moving that work back into macro expansion.

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*Consult [api-reference.md](api-reference.md) for complete listing*