In a function that generates HTML content, how would template literals enhance code readability and maintainability?
- They allow embedding variables directly in the string, reducing concatenation complexity.
- They provide a more concise syntax for creating HTML templates.
- They enable the use of complex expressions within the template, improving flexibility.
- They simplify the inclusion of special characters in the HTML content.
Template literals allow for more readable and maintainable code by directly embedding variables and expressions, reducing the need for complex string concatenation.
What is the primary role of the call stack in JavaScript execution?
- Manages function calls and keeps track of execution contexts
- Stores global variables
- Executes asynchronous code
- Manages browser events
The call stack in JavaScript is responsible for managing function calls. It keeps track of the execution contexts and the order in which functions are called. Understanding the call stack is crucial for comprehending the flow of execution in JavaScript programs.
How does a tagged template literal differ from a regular template literal?
- A tagged template literal is enclosed in backticks and allows expressions to be embedded.
- A regular template literal is enclosed in single quotes and cannot contain expressions.
- A tagged template literal can be used for multiline strings.
- A regular template literal cannot be assigned to a variable.
In a tagged template literal, a function (the tag function) is invoked, receiving the template string and evaluated expressions as arguments. This allows for custom string processing. Regular template literals do not involve a tag function.
What is the main difference between default and named exports in ES6 modules?
- Default exports allow exporting a single value or function per module, while named exports allow exporting multiple values with distinct names.
- Default exports can only be used with functions, whereas named exports can be used with any type of value.
- Default exports are used for private components, while named exports are used for public components.
- Default exports require an additional keyword for import, unlike named exports.
In ES6 modules, default exports are used to export a single value or function, while named exports allow exporting multiple values with distinct names. Default exports are particularly useful when there is only one main entity to be exported from a module.
Custom iterators can be created in JavaScript by defining a class with a Symbol.iterator method that returns an object implementing the _______ method.
- iterate()
- execute()
- iterator()
- next()
In JavaScript, custom iterators are created by defining a class with a Symbol.iterator method, and the method that needs to be implemented is 'next.' The Symbol.iterator method should return an object with a 'next' method.
The ________ field in package.json can be used to specify different entry points for importing a package in ES6.
- "main"
- "module"
- "entry"
- "import"
In ES6, the "module" field in package.json is used to specify the entry point for importing a package. It is the path to the main module of the package when imported.
Currying transforms a function with multiple arguments into a sequence of functions each taking a single ________.
- Argument, Value, Parameter, Variable
- Value, Parameter, Argument, Input
- Parameter, Input, Variable, Argument
- Input, Value, Argument, Parameter
Currying involves breaking down a function with multiple arguments into a series of functions, each taking a single parameter. This can enhance the flexibility and composability of functions.
Can a method in an ES6 class be both static and async?
- Yes
- No
- Depends on the method implementation
- Only if the class is marked as async
Yes, a method in an ES6 class can be both static and asynchronous. Static methods are called on the class itself, not on instances, and async methods use the async keyword to indicate asynchronous behavior. Combining these allows the creation of static methods that perform asynchronous tasks.
What is the syntax difference between method definitions in ES6 classes and traditional function expressions?
- ES6 classes use the function keyword
- ES6 classes use the method keyword
- ES6 classes use the def keyword
- ES6 classes use the => arrow syntax
The syntax difference lies in ES6 classes using the => arrow syntax for method definitions, providing a more concise way compared to traditional function expressions. The arrow function automatically binds the method to the class instance.
To handle errors in dynamic imports, use a __________ block.
- try-catch
- catch
- error
- finally
When using dynamic imports, it is recommended to use a try-catch block to handle potential errors that may occur during the loading of the dynamically imported module.