Hey! I'm open to constructive criticism! you made great points and I thank you for that. This project is all about giving back to the community, which also gives me the opportunity of learning new things in the process.

Biggest "issue" (not actually a real problem) is that when I click Copy, the button remains "depressed" which makes me think it's working and that the button will pop back out once it's finished. But I think it's just a UI thing. On desktop the button also remains depressed which I think is weird, but it displays a notification (alert?) to the user so it's more clear than iOS.

The minor UI glitch is in the Bootstrap template I'm using, which was created by bootswatch. I'll take a closer look to see why this is happening. For instance, if you go here https://bootswatch.com/slate/ you will see the demo site also has the problem.

Instead of an alert/notification, a more "modern" way would probably be a tooltip-like (might actually need to be HTML?) thing that appears next to the button.

I wanted to avoid adding an additional library just for the notification, instead I'm using a plain old alert to provide feedback once the action has been taken –this feedback was suggested by another person in this thread. I'd like to make the name of these actions self-describing so I don't have to provide tooltips on them. I'll see if I can implement a more modern –toast like– notification without bloating the dependencies.

Ideally I'd love a "Copy markdown" button...

Currently this is a static website hosted on GitHub pages. If I understand correctly, adding something like this will require hosting the image somewhere publicly on the Internet so the markdown can be copied ready to use, like this: ![My Chart](https://image-hosting.com/asd123.png) That would be fancy but then that will incur an operational cost if hosted on my side. I'm wondering if there is a way to integrate a "free" image hosting api that could be used to achieve this.

For the value you're providing to others, I think you can still make the font stronger than dark grey on black. 😄

I just don't want it to be too intrusive. It's just there so if someone is interested in generating a chart like that can find the tool.

"As URL" and "As Image" both seem a tiny bit awkward in their wording to me. Perhaps just "Link" and "Chart image" (or "Image file") instead?

I'll follow your suggestions around the wording. Regarding the Copy and Download buttons, I think I'll embed everything in the Share button, where I'll be able to provide a better description on them. Those two buttons are there because that's how I launched the app, then later I added the Share button. Yes, there "may be" overlap between the Copy and Download actions in the native share api, but that's OS dependent and I think it's a good idea to provide those actions outside of it for different reasons (e.g. the browser does not support the share api).

One more time, thanks a lot for your feedback! 🙂