Consider we have an array like this.
const arr = ["cat", "rabbit", "", "", 34, 354, null, 3, undefined];
Now we need to remove the empty strings, null and undefined values from the above array.
filter() method accepts the callback function as an argument and calls the callback function on each element present in the array.
If the callback function return value is true it keeps the element in array, if the return value is false it removes the element from an array.
const arr = ["cat", "rabbit", "", "", 34, 354, null, 3, undefined]; const remove = arr.filter(el=>el) console.log(remove);
["cat", "rabbit", 34, 354, 3]