JavaScript Definitions Worksheet: Advanced JavaScript (Modules 41–52)
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Date:
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Key terms
Write what each term means, in your own words.
1
=
2
=>
3
scope
4
try...catch
5
throw
6
JSON.stringify()
7
class
8
constructor
9
method
10
extends
11
new Map()
12
new Set()
Answer Key
JavaScript · Modules 41–52 · Student wording will vary for definitions
1= — Assigns a default value to a parameter, used only when no argument is passed for it.
2=> — A shorter syntax for writing a function, placed between the parameters and the function body.
3scope — The area of code where a variable can be accessed; variables declared inside a function are local to it.
4try...catch — Runs code in a try block, and if an error occurs, runs the catch block instead of crashing.
5throw — Creates a custom error and immediately stops the current code from running further.
6JSON.stringify() — Converts a JavaScript value into a JSON-formatted string.
7class — Declares a blueprint for creating objects with shared properties and methods.
8constructor — A special method inside a class that runs automatically when a new instance is created.
9method — A function declared inside a class body, called on an instance using dot notation.
10extends — Lets a class inherit properties and methods from another class.
11new Map() — Creates a new Map, a built-in object that stores key-value pairs.
12new Set() — Creates a new Set, a built-in object that stores only unique values.