In the JavaScript world, almost everything you see is an object. If you understand objects, you understand Javascript. There are lots of static methods where you can create objects, copy objects, seal ...

The JavaScript filter() method looks like any other method, except that it accepts parameters that provide more options for manipulating the data within an array. The filter() method accepts two named ...

The indexOf() method returns the first index of the element in the array, if the searching element is not present in the array then it returns -1. num.indexOf(3); // 2 num.indexOf(6); //-1 num.indexOf ...