Vanilla JavaScript is considered more lightweight than JavaScript with libraries for several reasons:

Key Factors Contributing to Lightweight Nature

1. No External Dependencies:

   • Vanilla JavaScript: Does not rely on any external libraries or frameworks, which means no additional code needs to be loaded or executed.

   • JavaScript with Libraries: Requires loading and executing library code, which adds to the overall size of the application.

2. Smaller Codebase:

   • Vanilla JavaScript: Typically results in a smaller codebase since developers only write the necessary JavaScript code without any additional library overhead.

   • JavaScript with Libraries: Libraries often include a lot of pre-written code for various functionalities, which increases the overall code size even if not all features are used.

3. Faster Execution:

   • Vanilla JavaScript: Executes directly in the browser without the need for additional processing or abstraction layers provided by libraries.

   • JavaScript with Libraries: May introduce additional processing steps or abstraction layers, which can slow down execution.

4. Less Resource Consumption:

   • Vanilla JavaScript: Requires fewer resources to run since it doesn't need to load or manage library code.

   • JavaScript with Libraries: Consumes more resources due to the need to load and execute library code, which can impact performance on devices with limited resources.

5. Simplified Development for Simple Tasks:

   • Vanilla JavaScript: Ideal for simple applications where the overhead of libraries is unnecessary, allowing for quick development and deployment.

   • JavaScript with Libraries: Often used for complex applications where libraries provide necessary features and structures, but this adds complexity and size.

In summary, Vanilla JavaScript is more lightweight because it lacks external dependencies, has a smaller codebase, executes faster, consumes fewer resources, and is well-suited for simple applications without unnecessary library overhead.