heatmaply + flexdashboard = Error in validateCssUnit(sizeInfo$width) : CSS units must be a single-element numeric or character vector

Question

---
title: heatmaply and flexdashboard don't mix...
output: 
  flexdashboard::flex_dashboard
---

### Chart 1
    
```{r}
library(heatmaply)
heatmaply(mtcars) 

I saw this question (2018):

R shiny error: Error in html tools::validateCssUnit(height); CSS units must be a single-element numeric or character vector

presumably they are related...

• Heatmaply is version: 1.1.1
• flexdashboard is version: 0.5.2

Answer 1

I used to have this for code: ggplotly(x) which caused the error.

I added ggplotly(x, height=500, width=1000) and the error went away.