So for your JS example, why would you attempt to reach them on Twitter when something like Github would be so much better? Create an issue on Github, point to the exact line of code that is a problem and wait for a response?
How do you ask a meaningful question about source code / software development in 140 characters? How do you get a meaningful response in 140 characters?
Because it's not just about issues - I don't exclusively want someone to interact with me in a setting that's centered around the content. I would preferably like the experience to be more free form and open to a wider audience. Incidentally, I don't think the 140 character limit has ever really bothered me. Most of the time I text shorter strings than that - if I want to have a longer conversation I'll either send multiple tweets, or move to DM/chat.
How do you ask a meaningful question about source code / software development in 140 characters? How do you get a meaningful response in 140 characters?