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fix typo in action-dynamic.Rmd #639

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fix typo in action-dynamic.Rmd #639

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2 changes: 1 addition & 1 deletion action-dynamic.Rmd
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Expand Up @@ -258,7 +258,7 @@ demo$deploy()
```

If you try out the live app at `r demo$link()`, you'll notice that when you switch datasets the summary output will briefly flicker.
That's because `updateSelectInput()` only has an affect after all outputs and observers have run, so there's temporarily a state where you have dataset B and a variable from dataset A, so that the output contains `summary(NULL)`.
That's because `updateSelectInput()` only has an effect after all outputs and observers have run, so there's temporarily a state where you have dataset B and a variable from dataset A, so that the output contains `summary(NULL)`.

You can resolve this problem by "freezing" the input with `freezeReactiveValue()`.
This ensures that any reactives or outputs that use the input won't be updated until the next full round of invalidation[^action-dynamic-3].
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