There are several built-in functions to interact with the user:

alert('Text message');
prompt('What is your name?');
confirm('Do you want to learn JavaScript')

Function

alert

shows a text message

alert('Text message');

Function

prompt

asks the user to input a text. It can be an answer for the question that the function asks the user

prompt('What is your name?');

The function has another optional parameter, which is a default value of the input

prompt('What is your favorite programming language?', 'JavaScript');

Function

confirm

asks the user and waits for the user to accept or cancel

confirm('Do you want to learn JavaScript')

Simple example of the three interactive functions together:

if (confirm('Do you want to learn programming?')) {
    let language = prompt('Choose your favorite programming language: JS, Python, PHP', 'JS');
    alert('You will be redirected to ' + language + " tutorial's page");
    window.location.href = 'https://w3schools.com/'+language;
} else {
    alert('Go waste your time with playing video games')
}