plotly doesn't render in notebook

[ChristelSwift]

I have an issue when using plotly in markdown:

• When i run a plotly command, the plot appears in the viewer rather than in the markdown document. How can i force it to render inline?
• When i knit to html, the markdown version works as expected but in the notebook version, there is no plot.

System details

RStudio Edition : Desktop
RStudio Version : 1.1.447
OS Version      :  macOS Sierra 10.12.3
R Version       :   3.5.0

Steps to reproduce the problem

here's an example code: the normal plot works fine but the plotly plot displays in viewer rather than inline and doesn't display when knitting to notebook:

`
title: "R Notebook"
output:
html_notebook: default
html_document: default

plot(cars)

library(plotly)
plot_ly(cars, 
        x=~speed, y=~dist, type = 'scatter', mode = 'markers')

`
sessionInfo()
R version 3.5.0 (2018-04-23)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS Sierra 10.12.3

Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRlapack.dylib

locale:
[1] en_GB.UTF-8/en_GB.UTF-8/en_GB.UTF-8/C/en_GB.UTF-8/en_GB.UTF-8

attached base packages:
[1] stats graphics grDevices utils datasets methods base

other attached packages:
[1] knitr_1.20 lubridate_1.7.4 bindrcpp_0.2.2 plotly_4.7.1.9000 readxl_1.1.0
[6] forcats_0.3.0 stringr_1.3.1 dplyr_0.7.4 purrr_0.2.4 readr_1.1.1
[11] tidyr_0.8.0 tibble_1.4.2 ggplot2_2.2.1.9000 tidyverse_1.2.1

loaded via a namespace (and not attached):
[1] Rcpp_0.12.16 lattice_0.20-35 assertthat_0.2.0 rprojroot_1.3-2 digest_0.6.15
[6] psych_1.8.4 mime_0.5 R6_2.2.2 cellranger_1.1.0 plyr_1.8.4
[11] backports_1.1.2 evaluate_0.10.1 highr_0.6 httr_1.3.1 pillar_1.2.2
[16] rlang_0.2.0.9001 lazyeval_0.2.1 rstudioapi_0.7 data.table_1.11.2 rmarkdown_1.9
[21] foreign_0.8-70 htmlwidgets_1.2 munsell_0.4.3 shiny_1.0.5 broom_0.4.4
[26] compiler_3.5.0 httpuv_1.4.3 modelr_0.1.2 pkgconfig_2.0.1 base64enc_0.1-3
[31] mnormt_1.5-5 htmltools_0.3.6 viridisLite_0.3.0 crayon_1.3.4 withr_2.1.2
[36] later_0.7.2 grid_3.5.0 nlme_3.1-137 jsonlite_1.5 xtable_1.8-2
[41] gtable_0.2.0 magrittr_1.5 scales_0.5.0.9000 cli_1.0.0 stringi_1.2.2
[46] reshape2_1.4.3 promises_1.0.1 xml2_1.2.0 RColorBrewer_1.1-2 tools_3.5.0
[51] glue_1.2.0 hms_0.4.2 crosstalk_1.0.0 parallel_3.5.0 yaml_2.1.19
[56] colorspace_1.3-2 rvest_0.3.2 bindr_0.1.1 haven_1.1.1

[jmcphers]

This is the same issue as #2748; R 3.5 made some changes which cause HTML widgets to fail to display properly in notebook chunks. We have a fix and hope to have a patched build out by the end of the week. If you can't wait, you can try one of our daily builds:

https://dailies.rstudio.com/

[ronblum]

Verified on MacOS 10.14 Mojave and Windows 10.