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Javascript: New Syntax

String Concatenation

Typically when concatenating a string you would chain items together with “” and + like so

var dog = "German Shepard";
var cat = "Himalayan Tabby";

console.log("I love my new " + dog + " but your " + cat + " is also beautiful");

however you can now insert variables dynamically into strings to make concatenation easier. Wrap variables in ${}. This is called “template literal”.

var dog = "German Shepard";
var cat = "Himalayan Tabby";

console.log(`I love my new ${dog} but your ${cat} is also beautiful`);

const & let

Intended to replace var.

const and let are both variables but with one key difference. let can have it’s value changed by a function, while const is truly constant and cannot be changed by anything.


When digging into objects there are two ways to identify your target. The result is identical

bracket notation

var parsedBody = JSON.parse(body);

dot notation

var parsedBody = JSON.parse(body);

Arrow Function

There is a new syntax for functions. The standard syntax is:

//code to execute

Arrow notation would be

(argument) => {
//code to execute

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