It mainly depends on what you need to develop. For blog, static websites and most of landing websites, I guess you can go with vanilla JS (instead of that heavy Jquery library). I recently visited a landing website that downloaded 10 MB of JS only to show a typewriting animation. But you should also need to comprehend why we moved to JS framework. One of the most helpful pattern in software engineering is the reusing method. Framework such as React, Angular or Vue really help developers to build an acceptable UX without too much efforts (reducing the development costs). The vanilla JS can not be used for building an entire application based on javascript for many reasons. The first is that you can not re-use components from other projects: when it was created, there wasn't the concept of "dependencies". Someone tends to compare vanilla JS and modern frameworks with the comparison between C and C++. C was great, you could manage the raw pointers with the lowest overhead possible, but you can do errors and re-using components is difficult. From the other side, we have C++ which allows you to manage your code better and not to worry about pointers, objects and much more. So, the final reason for choosing one or the other is the balance between development speed and product speed. Let's make a given example. For sure, a vanilla-based JS is easier to load for browsers, but if you're going to build UI good luck. On the other head, JS frameworks allow you to make a dashboard in a few hours, but browsers will spend a lot of time downloading the components and manipulating the DOM for you.
It mainly depends on what you need to develop. For blog, static websites and most of landing websites, I guess you can go with vanilla JS (instead of that heavy Jquery library). I recently visited a landing website that downloaded 10 MB of JS only to show a typewriting animation. But you should also need to comprehend why we moved to JS framework. One of the most helpful pattern in software engineering is the reusing method. Framework such as React, Angular or Vue really help developers to build an acceptable UX without too much efforts (reducing the development costs). The vanilla JS can not be used for building an entire application based on javascript for many reasons. The first is that you can not re-use components from other projects: when it was created, there wasn't the concept of "dependencies". Someone tends to compare vanilla JS and modern frameworks with the comparison between C and C++. C was great, you could manage the raw pointers with the lowest overhead possible, but you can do errors and re-using components is difficult. From the other side, we have C++ which allows you to manage your code better and not to worry about pointers, objects and much more. So, the final reason for choosing one or the other is the balance between development speed and product speed. Let's make a given example. For sure, a vanilla-based JS is easier to load for browsers, but if you're going to build UI good luck. On the other head, JS frameworks allow you to make a dashboard in a few hours, but browsers will spend a lot of time downloading the components and manipulating the DOM for you.

It mainly depends on what you need to develop. For blog, static websites and most of landing websites, I guess you can go with vanilla JS (instead of that heavy Jquery library). I recently visited a landing website that downloaded 10 MB of JS only to show a typewriting animation. But you should also need to comprehend why we moved to JS framework. One of the most helpful pattern in software engineering is the reusing method. Framework such as React, Angular or Vue really help developers to build an acceptable UX without too much efforts (reducing the development costs). The vanilla JS can not be used for building an entire application based on javascript for many reasons. The first is that you can not re-use components from other projects: when it was created, there wasn't the concept of "dependencies". Someone tends to compare vanilla JS and modern frameworks with the comparison between C and C++. C was great, you could manage the raw pointers with the lowest overhead possible, but you can do errors and re-using components is difficult. From the other side, we have C++ which allows you to manage your code better and not to worry about pointers, objects and much more. So, the final reason for choosing one or the other is the balance between development speed and product speed. Let's make a given example. For sure, a vanilla-based JS is easier to load for browsers, but if you're going to build UI good luck. On the other head, JS frameworks allow you to make a dashboard in a few hours, but browsers will spend a lot of time downloading the components and manipulating the DOM for you.

It mainly depends on what you need to develop. For blog, static websites and most of landing websites, I guess you can go with vanilla JS (instead of that heavy Jquery library). I recently visited a landing website that downloaded 10 MB of JS only to show a typewriting animation. But you should also need to comprehend why we moved to JS framework. One of the most helpful pattern in software engineering is the reusing method. Framework such as React, Angular or Vue really help developers to build an acceptable UX without too much efforts (reducing the development costs). The vanilla JS can not be used for building an entire application based on javascript for many reasons. The first is that you can not re-use components from other projects: when it was created, there wasn't the concept of "dependencies". Someone tends to compare vanilla JS and modern frameworks with the comparison between C and C++. C was great, you could manage the raw pointers with the lowest overhead possible, but you can do errors and re-using components is difficult. From the other side, we have C++ which allows you to manage your code better and not to worry about pointers, objects and much more. So, the final reason for choosing one or the other is the balance between development speed and product speed. Let's make a given example. For sure, a vanilla-based JS is easier to load for browsers, but if you're going to build UI good luck. On the other head, JS frameworks allow you to make a dashboard in a few hours, but browsers will spend a lot of time downloading the components and manipulating the DOM for you.