How to link to heading containing dot (.) or comma (,) in markdown file (Table of contents)?

In my Readme.MD markdown file I want to create Table of Contents (for Github). [TOC] (generated by Typora) doesn't show on Github. It shows like [TOC]. Some of my headings contain characters like a dot or a comma. Is there any way to link to these headings?

I tried almost everything I think, such as: [app.js File](#app.js-file), [app.js File](#app-js-file), [app.js](#app--js-file), [app.js](#app\.js-file), [app.js](#appjs-file). Nothing works.

Here is an example:

Table of contents:
[app.js](#app-js)
[script.js](#script.js)
[One, two, three](#one,-two,-three)

# app.js File
Some text

# script.js File
Some text

# One, two, three
Some text

P.S. Some people are talking about creating HTML-anchors (named), but how/where do you write them in your MD-file (in case it is the solution). Could you explain it please (I couldn't find any solution on the internet).

Solution

If you mouse over the header you want to link to in the rendered content you should see a link icon appear. Mouse over that icon to see what it's linking to, and use that as your target. I think you'll find the links named

appjs-file
scriptjs-file
one-two-three

This answer points to some logic that may drive link naming but I haven't been able to confirm.

As a side note, Markdown is designed to be easily read even in its raw form. I strongly recommend adding a space between the header hashes and header text and a blank line between the header and its content, e.g.

# app.js File

Some text

Some Markdown processors will require one or both of these to render properly.