I am going to write a blog with tutorials, tips and tricks, useful plugins of ExtJs. The CMS of the blog will be wordpress.
The source code of the plugins will be available in github or directly on my server. I would like to put there working examples of the plugins and code samples of the tutorial articles.

I have downloaded extjs 6.2.0 with gpl 3 licence and cmd for this purpose. Will I have problems in this case?

I thought also about the fiddle.sencha.com but unfortunately it is not stable and I cannot write there complicated sample codes.