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← Introduction to JavaScript
○What is JavaScript?○Your First JavaScript Code○Data Types○Type Checking
○Declaring Variables○let and const in Practice○Operators○Type Conversion
○Conditionals○Switch Statement○For Loops○While Loop○Break and Continue
○Defining Functions○Arrow Functions○Scope○Closures○Project - Calculator○Function Expressions
○Arrays○Array Mutation Methods○Array Search and Slice○Array Iteration Methods○Multidimensional Arrays○Destructuring○Array Reverse and Sort○Array Fill○Array Find and Includes○Array Flat and FlatMap○Array Reduce, Some, and Every
○Objects○Object Methods and Destructuring○JSON○Math and Date○Date Basics
○02 Template Literals○String Methods○Regular Expressions
○Higher-Order Functions●Callbacks○map, filter, and reduce○Recursion○Project - Data Transform Pipeline
○OOP Introduction○Classes○Inheritance○Encapsulation
○Asynchronous JavaScript○Promises and Async Await○Async API Simulation

Callbacks

A callback is a function passed into another function. Instead of only describing that idea, this lesson makes the callback run three times and shows the collected results.

Example

javascript
function repeatAction(callback) {
  callback();
  callback();
  callback();
}

Your Task

  1. Write repeatAction(callback) so it runs the callback three times.
  2. Use it to fill runs with three run values and display run,run,run in #output.
Hint 1
1 / 2
HINT 1

Call the callback three times inside repeatAction.

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