{"id":86631,"date":"2017-06-17T11:38:01","date_gmt":"2017-06-17T11:38:01","guid":{"rendered":"https:\/\/webkul.com\/blog\/?p=86631"},"modified":"2017-06-17T11:38:01","modified_gmt":"2017-06-17T11:38:01","slug":"javascript-scope","status":"publish","type":"post","link":"https:\/\/webkul.com\/blog\/javascript-scope\/","title":{"rendered":"JavaScript Scope"},"content":{"rendered":"

JavaScript has a feature called scope. The concept of the scope in not that easy to understand for many new developers but I will try my best to explain them in simple way. Understanding scope will make your code better and key to writing bulletproof code and being a better developer.<\/p>\n

What Is Scope?<\/strong><\/p>\n

In JavaScript scope is the set of variables, functions and objects you have accessed to. Scope refers to the current context of your code. scope can be defined globally and locally.<\/p>\n

Global Scope<\/strong><\/h1>\n

Before writing code in JavaScript, you are in what we call Global Scope<\/strong>. If we declare a variable, It’s considered as Global Variable<\/strong>.<\/p>\n

\"\"<\/p>\n

Variables inside the global scope can be accessed and altered in any other scope.<\/p>\n

\"\"<\/p>\n

Local Scope<\/strong><\/h1>\n

There is typically one global scope and each function defined has its own local scope. Any function defined with in another function has a local scope of the parent function.<\/p>\n

If I create function and defined some variables, those variable will be the local variables of that function. Take an example –<\/p>\n

\"\"<\/p>\n

Automatically Global<\/strong><\/p>\n

If we assign a value to a variable that has not been declared then that variable will be considered as Global Variable<\/strong>.<\/p>\n

\"\"<\/p>\n

I hope you got a better understanding of JavaScript Scope and things around it. Thanks<\/p>\n","protected":false},"excerpt":{"rendered":"

JavaScript has a feature called scope. The concept of the scope in not that easy to understand for many new developers but I will try my best to explain them in simple way. Understanding scope will make your code better and key to writing bulletproof code and being a better developer. What Is Scope? 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