Welcome, How to Search Elements in an Array of an Object & Filter out the Falsy Values in Hindi in 2020. Array.prototype.filter() The filter() method creates a new array with all elements that pass the test implemented by the provided function. Syntax let newArray = arr.filter(callback(currentValue[, index[, array]]) { // return element for newArray, if true }[, thisArg]); Return value A new array with the elements that pass the test. If no elements pass the test, an empty array will be returned. Null and Undefined are both data types in JavaScript. Undefined is a variable that has been declared but not assigned a value.