What are some common JavaScript functions?

What are some common JavaScript functions I should know?

Some common JavaScript functions include alert(), console.log(), parseInt(), and setTimeout(). Would you like to know more about any specific function?

Can you explain how setTimeout() works?

Sure! setTimeout() is used to execute a function after a specified number of milliseconds. For example, setTimeout(() => { console.log('Hello!'); }, 1000); will log 'Hello!' after 1 second.

What about map()? How does that function work?

The map() function creates a new array populated with the results of calling a provided function on every element in the calling array. For example, [1, 2, 3].map(x => x * 2) will return [2, 4, 6].

Are there any other useful array functions?

Yes, other useful array functions include filter(), reduce(), and forEach(). Each serves a different purpose for manipulating arrays.