embedding markdown in HTML tag

ISSUE

When I try to use the markdown syntax in <details> HTML tags, for example, code blocks, encounter the problem of code blocks that cannot be rendered.

The source code is as follows:

<details>
<summary> aaa </summary>
` ` `cpp
int a = 1;
` ` `

</details> 

` char seems unable to be translated in code block, so I added space characters between them

It will display in browser as follows:

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aaa

```cpp int a = 1; ```

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SOLUTION

This issue seems to occur in the kramdowm markup process, rather than in GFM:

• GFM allows embedding HTML inside Markdown
• Embedding Markdown in Jekyll HTML

And in the link Embedding Markdown in Jekyll HTML, a solution is provided:

Use <details markdown="1"> instead <details>.

It will run as expected

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aaa

int a = 1;

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