Using await outside of any function (at the top level) is not allowed and results in an unhandled promise rejection. The top-level code doesn't have the necessary structure to handle asynchronous operations using await. To use await, it should be inside an async function. Otherwise, it leads to unexpected behavior and unhandled promise rejections.

In ES6, each module gets its own instance of a dependency when imported. This ensures encapsulation and prevents unintended sharing of state between modules. Even if multiple modules import the same dependency, they work with independent instances, providing isolation and avoiding potential conflicts. This behavior aligns with the modular and encapsulated nature of ES6 modules, contributing to better code organization and maintainability.

Choosing ES6 Modules facilitates a more seamless transition between browser and Node.js environments due to its standardized syntax and support for asynchronous module loading. CommonJS, with its synchronous nature, might require additional efforts to adapt to the asynchronous nature of browser environments.

The key difference is that forEach is primarily for iteration and doesn't return a new array, whereas map is used for transformation and creates a new array with the results of applying a function to each element of the original array.

In ES6, mixins and composition allow developers to combine functionalities from different sources, promoting code reusability. Mixins help in reducing redundancy, while composition enables the creation of modular and maintainable code.

In the context of Promises, the catch method is commonly used to handle the rejection of a Promise. It allows you to specify a callback function that will be called if the Promise is rejected, providing a way to handle errors in asynchronous operations.

Tree shaking analyzes the code to include only the necessary parts. In this scenario, only the functions that are used will be included, resulting in a smaller bundle size. The other options are incorrect, as tree shaking specifically targets unused code.

In a static method of an ES6 class, this refers to the class itself, not to an instance of the class. Static methods are called on the class, not on instances, so they don't have access to instance-specific properties or methods.

Yes, in ES6 object literals, you can use computed property names, allowing you to dynamically set property names based on variables or expressions.

Template literals provide enhanced readability due to their concise and expressive syntax. They allow embedding variables directly within the string using ${} syntax, making the code more readable and maintainable.