About question one. I want to know how to use javascript libraries, as I explained.
And question two, the link explain it for angular. So simply would be as question one, but with angular instead of javascript.
My 2nd question could be rephrased as:
Is it the same to talk about about angular 2 and ionic 2?
If I follow steps in the link, nothing will fail in a ionic project?
Ah, okay, yes, rephrasing it helped. For the most part yes, you can talk about them as if they were the same. Ionic 2 uses Angular 2, and provides extra styles and components to make mobile app development easier.
There are some special cases where Ionic 2 differes, like it doesn’t user the Angular router, it uses it’s own Navigation Controller, but those details aside they are one in the same.
The term “widget” is so overloaded that it’s become pretty meaningless. Yes you can use JavaScript libraries in Ionic applications. Yes you can even use jQuery, although most every time I’ve seen somebody talking about wanting to use this or that jQuery thingy, an Angular alternative exists, and that should always be your preferred strategy. Read this.