JavaScript: Pass a JavaScript function as parameter

JavaScript Function: Exercise-28 with Solution

Pass Function as Parameter

Write a JavaScript program to pass a 'JavaScript function' as a parameter.

Sample Solution-1:

JavaScript Code:

// Define a function named addStudent that takes an id and a refreshCallback function as parameters
function addStudent(id, refreshCallback) {
    // Call the refreshCallback function
    refreshCallback();
}

// Define a function named refreshStudentList that logs 'Hello' to the console
function refreshStudentList() {
    console.log('Hello');
}

// Call the addStudent function with parameters 1 and the refreshStudentList function
addStudent(1, refreshStudentList); 

Output:

Hello

Flowchart:

Live Demo:

See the Pen JavaScript - Pass a JavaScript function as parameter-function-ex- 28 by w3resource (@w3resource) on CodePen.

Sample Solution-2:

JavaScript Code:

// Function that takes a JavaScript function as a parameter
function executeFunction(func) {
  console.log("Executing the provided function...");
  func(); // Invoke the provided function
}

// Function to be passed as a parameter
function sampleFunction() {
  console.log("This is a sample function.");
}

// Calling the main function and passing the sample function as a parameter
executeFunction(sampleFunction);

Output:

Executing the provided function...
This is a sample function.

Flowchart:

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