1. What does the JavaScript Array Filter Function do?
2. How do you use the JavaScript Array Filter Method?
3. What is a JavaScript Array Filter exa

JavaScript Filter Function

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2021-05-21 18:00:06

1. What does the JavaScript Array Filter Function do? 2. How do you use the JavaScript Array Filter Method? 3. What is a JavaScript Array Filter example?

When the Filter Method is run on an array JavaScript will return an array of all of the elements that passed the filter function.

If the function return value is false when the function is run on that particular element, then it doesn't keep the element.

After the Filter Method has been run on every element of the array it returns a new array with only the elements that it kept.

This function will be a JavaScript Callback Function because it is a function being passed as a parameter into another function.

The final thing we do is to use the JavaScript Array Filter method to run our callback function on each element of the initial array we are using in this JavaScript Filter Function example.

Now you know what a JavaScript Filter Function Method is and how to construct it and run it on a JavaScript Array with a callback function of your choosing.