Update article.md

[davidshq]

Minor changes to grammar

[iliakan]

Please explain, is the current grammar wrong or bad?

Also, mentioning "the problem" is a bit clearer than mentioning "constraints", isn't it?

[davidshq]

@iliakan - It's a balance between readability and clarity. Problem is a simpler word, constraint more clearly states the type of problem. That said, I don't have a strong opinion on this. If you want to retain problem, I'd change the wording to:

"which do not the same problems as event handlers."

"They are free of such a problem" isn't clear as to what problem exactly is present, the above clarifies while retaining "problems" to maintain readability.

[iliakan]

Merged, replaced the last phrase with "Developers of web standards understood that long ago and suggested an alternative way of managing handlers using the special methods addEventListener and removeEventListener which aren't bound by such constraint."

Thanks!