How to add table of contents in R notebook?

[brennan2018]

I am using RStudio 1.1.463 on macOS 10.13.6 (17G65).

I have tried the syntax on this post

---

title: "R Notebook"
output:
html_document:
toc: true
theme: united
df_print: paged
code_folding: hide

but the toc didn't show up.

adding css as follow

html_notebook:
css: /.../.../my.css

causes error

pandoc: Could not fetch /.../.../my.css
/.../.../my.css: openBinaryFile: does not exist (No such file or directory)

How to add table of contents in R notebook?

[Yarnabrina]

I think you need to align yaml part properly.

I tried the following, and it works.

---
title: "R Notebook"
output:
  html_notebook:
    toc: yes
---

# first level 1 heading

bla bla bla

# second level 1 heading

## first level 2 heading under second level 1 heading

bla bla bla

## second level 2 heading under second level 1 heading

bla bla bla

This generates the following:

[brennan2018]

your screenshot imply this paged is generated by Knit, so this html is NOT generated automatically. every time you want to preview, you need to generate this manually by clicking Knit. is it?

[brennan2018]

it is weird. if i don't include toc: true, each time i refresh the .nb.html, the change i made in rmd file get synched. if i include toc: true, the nb.html does not change anymore, i have to Knit it manually. what i am missing?

[brennan2018]

I just restarted, everything is going back to work, thank u so much!

[brennan2018]

with Yarnabrina help, I finally found the root cause -- i misused html_document rather than html_notebook.

html_notebook works well.