Jayman Pandya

Symbol is the 7th primitive type in JavaScript after number, string, object, boolean, null and undefined. Symbols are unique identifiers that have descriptors. Symbols can avoid naming collisions. We cannot loop over symbols. Peace ✌️

Promises are object that will produce some data in future or will return an error why the promised data was not produced. then() callback function is used to intimate when the resolved data is returned….

When you are assigning a property of an object to a variable you can skip writing the assignment if the property name and variable name are same. You can also define the methods in shorthand…

Spread takes all the items in the specified iterables (arrays, objects etc) and copies it. When you do not know the number of arguments that will be passed in a function you can use Rest…

Array.from() convert Objects, Node-lists to Arrays, so that you can use all the Array functions to iterate through the data. Array.of() allows you to pass arguments in the function which will be converted to an…

For Of loops are new in Javascript and can be used to loop on any kind of iterable data except object. Iterable data are Arrays, String, Map, Set, Generator etc. For Of loop does not…

Destructuring allows us to extract data from Objects, Arrays, Maps & Sets. It allows you to write DRY code. Object Destructuring You will have to use “{}” (curly braces) for Object Destructuring. const facilityDetails =…

ES6 has introduced 4 new methods to manipulate strings. .startsWith(); .endsWith(); .includes(); .repeat(); They are pretty straightforward. Some examples to show what they are useful for. const panNo = “AQAPP1865C”; // .startsWith(); checks if the…