JavaScript is very easy to learn, especially since you already know Java, you are familiar with its syntax. But you have to grasp two important concepts about JavaScript. First, the fact that JavaScript is a functional programming language and functions are first-class citizens here. Second, you should understand the prototype inheritance concept. I think these are the most important differences between JavaScript and Java. Besides, you should know that being a scripting language, JavaScript needs a host environment. It is usually run in the browser for client-side programming, but it is also widely used for server-side programming, notably with NodeJS. There is also Nashorn which is part of JDK 8 and later, which enables you to run JavaScript programs on top of Java. It's actually very cool. You can have the advantages of both Java and JavaScript all at once, and it is very fast too.
JavaScript is very easy to learn, especially since you already know Java, you are familiar with its syntax. But you have to grasp two important concepts about JavaScript. First, the fact that JavaScript is a functional programming language and functions are first-class citizens here. Second, you should understand the prototype inheritance concept. I think these are the most important differences between JavaScript and Java. Besides, you should know that being a scripting language, JavaScript needs a host environment. It is usually run in the browser for client-side programming, but it is also widely used for server-side programming, notably with NodeJS. There is also Nashorn which is part of JDK 8 and later, which enables you to run JavaScript programs on top of Java. It's actually very cool. You can have the advantages of both Java and JavaScript all at once, and it is very fast too.
love to read it. thanks@ghasemkiani:-)