Sory for my bad english!
How to make (simply, font color,size,bold,italic,underline,url,and image,undo,redo) tiny editor?
Is there any website with tutorial?
There is nothing tiny about it ;)
References and tutorials on developing rich text editors are rare and extremely difficult to find (I never found one till today). You should check out the open-source rich text editors and try to understand what they do in the sourcecode.
An example of an open-source WYSIWYG editor:
Try googling though to find the (maybe) one tutorial on the web on this subject? If you found it, feel free to post it below for others (including myself)!
Before I forget, I also decided to make a tiny editor myself after your question with an API etc. (but release date is about two weeks from now ;) ) but before I started my own, I created a tutorial on how to do make a tiny editor (aka a rich text editor). You might want to check it out:
Link to the tutorial on how to make a rich text editor WYSIWYG:
Thank you very much!