Challenge 1
Declare a variable with a lexical declaration.
javascript
Your answer
const source = ;Press Ctrl⌘Enter to check your answer
Code Completion
8 Challenges
JavaScript Source Text, Lexical Grammar & Parsing — Code Completion
Practice recognizing source-level grammar constructs, directives, literals, comments, and statement boundaries.
Challenge 2
Write a regular expression literal.
javascript
Your answer
const pattern = ;Press Ctrl⌘Enter to check your answer
Challenge 3
Create a template literal containing name.
javascript
Your answer
const message = ;Press Ctrl⌘Enter to check your answer
Challenge 4
Return without putting the expression on a new line.
javascript
Your answer
function value() { return ; }Press Ctrl⌘Enter to check your answer
Challenge 5
Add an explicit statement terminator.
javascript
Your answer
const total = 1 + 2
Press Ctrl⌘Enter to check your answer
Challenge 6
Add a strict-mode directive.
javascript
Your answer
function run() {
return 1;
}Press Ctrl⌘Enter to check your answer
Challenge 7
Use a classifying comment without changing execution.
javascript
Your answer
const value = 1;
const result = value;Press Ctrl⌘Enter to check your answer
Challenge 8
Create a module export declaration.
javascript-module
Your answer
export const answer = ;Press Ctrl⌘Enter to check your answer