i for one, am a super lazy reader. i enjoy answering questions and solving problems but i don't always like to actually read the description, especially since so many people aren't native English speakers or are just bad at conveying ideas. often i'll skim the question and just go right to the code. i'm sure i'm not the only one. while this is entire my own fault and not yours, you will surely get more attention by making your questions as short and to the point as possible. that goes for teh code too. for example..
// add JS-classes into the HTML-Tag
is it really necessary to comment this line of code? it took me longer to read the comment than it did to read the code and the code is basically as readable as natural english.
the first sentence is not relevant to the question and can safely be removed. congratulations and all, but we don't really need to know that it's your first project. honestly, you did a good a job so no one would have guessed that.
tldr: cut the fat in your question and you might get more responses. people are voluteering their time to help you for free so do whatever you can to make it easier for them. and on CR, if you don't get reviews, that's a good thing. that means there's nothing obvious that sticks out to readers as a problem. no one's going to leave an answer just to say you did a good job and there's nothing that can be improved.