How to filter JavaScript Array using filter() method?

 The filter() method in JavaScript is used to create a new array with all the elements that pass the test implemented by the provided function.

The syntax of the filter() method is as follows:

c
array.filter(callback(element[, index[, array]])[, thisArg])

Here, array is the array to be filtered, and callback is the function that is used to test each element of the array. The callback function takes three arguments:

• element: The current element being processed in the array.
• index (optional): The index of the current element being processed in the array.
• array (optional): The array on which filter() was called.

The thisArg parameter is optional and represents the this value for the callback function.

The filter() method creates a new array with all the elements that pass the test implemented by the callback function. The elements that fail the test are excluded from the new array.

For example, let's say we have an array of numbers:

javascript
const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

We can use the filter() method to create a new array that contains only the even numbers from the original array:

typescript
const evenNumbers = numbers.filter(number => number % 2 === 0);

In this example, the callback function tests each element of the numbers array to see if it is even (number % 2 === 0). If an element passes the test, it is included in the new evenNumbers array. The result of the filter() method is [2, 4, 6, 8, 10].