Why do you need to pass a function to filter an array? code example

Example 1: how the filter() function works javascript

const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9];

const filter = arr.filter((number) => number > 5);
console.log(filter); // [6, 7, 8, 9]

Example 2: javascript array filter elements greater than

function isGreater(element, index, array) { 
   return (element >= 10); 
} 
          
let testElemets = [12, 5, 8, 130, 44].filter(isGreater); 
console.log("Test Value : " + testElemets );