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Last active May 20, 2024 22:17
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How to add a collapsible section in markdown.

How to add a collapsible section in markdown

1. Example

Click me

Heading

  1. Foo
  2. Bar
    • Baz
    • Qux

Some Javascript

function logSomething(something) {
  console.log('Something', something);
}

2. Code/Markdown

<details>
  <summary>Click me</summary>
  
  ### Heading
  1. Foo
  2. Bar
     * Baz
     * Qux

  ### Some Javascript
  ```js
  function logSomething(something) {
    console.log('Something', something);
  }
  ```
</details>

3. Tips & Tricks

3.1 Expand by Default

To have a collapsible section expanded by default, simply include the 'open' attribute within the <details> tag:

Hello World!
<details open>
  <summary>Hello</summary>
  World!
</details>

3.2 Customize Clickable Text

You can modify the appearance of the clickable text by adding styling inside the <summary> tags:

Wow, so fancy WOW, SO BOLD
<details>
  <summary><i>Wow, so fancy</i></summary>
  <b>WOW, SO BOLD</b>
</details>

3.3 Nested Collapsible Sections

NB: When including headings within collapsible sections, remember to add a new line after the <summary> tag.

Section A
Section A.B
Section A.B.C
Section A.B.C.D Done!
<details>
<summary>Section A</summary>
<details>
<summary>Section A.B</summary>
<details>
<summary>Section A.B.C</summary>
<details>
<summary>Section A.B.C.D</summary>
  Done!
</details>
</details>
</details>
</details>

Troubleshooting

  • If certain markdown or styling, such as # My Title, fails to render in the collapsible section, try adding a line break after the </summary> tag.
  • If your section fails to render, it might be malformed. Consider copying the functional examples provided here and building from there!
@moshiurse
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moshiurse commented Mar 6, 2024

@moshiurse, Could you paste your markdown here and see how it renders? If the behaviour is reproducible, we can debug it. If the behaviour is normal, then the problem is in your environment.

See Here

Sometimes with a root user, things might not work properly. So creating a new user with sudo permission is a better option.
<details>
<summary><h2>See Here</h2></summary>
  Sometimes with a root user, things might not work properly. So creating a new user with sudo permission is a better option.
</details>

Looks like it working in this comment but in my repo it is not working!!
For directly check the md file you can check this: https://github.com/moshiurse/moshiurse/blob/main/Cloud-Server-Setup.md

@pierrejoubert73
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Author

pierrejoubert73 commented Mar 6, 2024

@moshiurse Interesting. It looks fine to me. Perhaps it is browser-related. Which browser/version are you running?
Edit: Sorry, I just realized you said it looks fine here. But the fact that it still looks ok to me on your md but not for you is quite odd. Do you think it could be a responsive issue?
image

@moshiurse
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@moshiurse Interesting. It looks fine to me. Perhaps it is browser-related. Which browser/version are you running? Edit: Sorry, I just realized you said it looks fine here. But the fact that it still looks ok to me on your md but not for you is quite odd. Do you think it could be a responsive issue? image

I don't use h2 tag here
When i am using it looks like this
image
Now I update the md file you can see. https://github.com/moshiurse/moshiurse/blob/main/Cloud-Server-Setup.md

@thc282
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thc282 commented Mar 6, 2024

@moshiurse
about the tag problem
i have tried, if the h2 outside the details is fine. it won't have any new line in the summary. However all the content inside the details will becomes h2

And i think this just the github issue. In long ago, i have tried the same trick in my repo. It work well and dont have any newline, now that repo summary text just move to next line

@beatrizsmerino
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Hi @moshiurse!

I have the same problem, although it didn't happen a few days ago.

Here you can see something about:

I tried everything and in the end I had to use svg images.
In short, the problem is that a few days ago Github didn't treat h1 etc. as block elements, so the arrow and the title were seen side by side.

@DolevArtzi
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@Sterh20 the table rendering works without markup <summary>Click me</summary>.

@brunolnetto I was too hasty. Turns out you can make it work with summary section too. You just need to add additional empty line after summary section:

Click me

<details>

  <summary>Click me</summary>

  | Header 1 | Header 2 |
  | -------- | -------- |
  | Row 1    | Row 1    |
  | Row 2    | Row 2    |
  
</details>

Wanted to add that this also works for LaTeX, including double $$ blocks. see example:


Rendered Output:

Proof of variance of geometric

Reveal Proof To compute the variance of $X$, where $X \sim \text{Geom}(p)$, we'll start by finding the second moment. $$E[X^2] = E[X^2 \mid A]P[A] + E[X^2 \mid A^c]P[A^c]$$

Code:

 <details><summary>Reveal Proof</summary>
 To compute the variance of $X$, where $X \sim \text{Geom}(p)$, we'll start by finding the second moment. 
 $$E[X^2] = E[X^2 \mid A]P[A] + E[X^2 \mid A^c]P[A^c]$$
</details>```

@jhj0517
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jhj0517 commented Apr 5, 2024

Hi! I want to test if I can embed image inside detail.

demo Content1

Content2

ForegroundService

It works! very thanks.

@brendanmaguire
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Click The rest

@KelvinKaungDev
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@lebathang
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test Hello everyone here

code:

 <details>
 <summary>test</summary>
 <b>Hello everyone here<b>
 </details>

@vinser
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vinser commented Apr 29, 2024

Using this code in my project README.md on GitHub

### Setup and fine tuning
<details>
<summary><i><h4>1. Main configuration file</h4></i></summary>
For advanced sutup you can edit `config/config.yml` selfexplanatory configuration file.  
This file by default is located in `config` subfolder of program file location.
</details>

I get what it should be:

Setup and fine tuning

1. Main configuration file

For advanced sutup you can edit `config/config.yml` selfexplanatory configuration file. This file by default is located in `config` subfolder of program file location.

But when I use the same code on GitHub Pages with classic minima skin I get line break between marker and summary tip the same as moshiurse wrote above.
image

Are any thoughts how to fix this?

@mayank7j-shell
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Testing if really need to add indentation. Turns out, not really.

Click me
Header 1 Header 2
Row 1 Row 1
Row 2 Row 2

Code:

<details>

<summary>Click me</summary>

| Header 1 | Header 2 |
| -------- | -------- |
| Row 1    | Row 1    |
| Row 2    | Row 2    |
  
</details>

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