Hi Amar,
Thanks for contacting Syncfusion support.
JavaScript is a front-end framework to program web browser that controls how it responds to user interaction, manipulate DOM, handling Dates, Numbers, arrays and much more. Apart from that JavaScript has evolved much more to become a modular language by introducing the concept of Modules, that lets you create a large web application using OOPS concept and keeps added with new features. To be a better front-end developer you would need to get a strong foundation and get used to the basics of this language.
All the concepts required get strong with JavaScript were explained well in the articles you mentioned.
So, our suggestion is that you would need to really start practicing what you learn from various resources, so that you would become more confident of what you learnt.
If you are looking for a more light-weight and user-friendly components that would help you in increasing your productivity, please check out our components in the below help pages.
Regards,
Deepa L.