JavaScript Functions Tutorial (Different Ways to Create Functions + Constructors)
JavaScript functions tutorial, how to create functions in JavaScript, JavaScript function constructor explained, different ways of defining functions in JavaScript. Learn step by step how functions work as both code and objects.
⏱️ Timestamps:
00:00 Introduction – different ways of creating functions in JavaScript
00:04 Using the function keyword to define a named function
00:23 Running a simple function in JSFiddle
00:49 Creating anonymous (nameless) functions
01:22 Using anonymous functions with jQuery’s .each()
01:59 Creating functions with the Function constructor
02:32 Objects created with constructors (Object, Date, Function)
03:03 Function constructor creates nameless functions
03:36 Assigning nameless functions to variables (named afterward)
04:14 Function expressions – assigning anonymous functions to variables
04:54 Function constructor with a body passed as a string
05:54 Function constructor with parameters and body (a+b example)
07:02 Correct way to define parameters as strings in constructor
07:29 Running a function that adds numbers (2 + 5 example)
08:44 Why most people prefer function keyword over new Function
09:31 Creating plain objects with new Object()
10:05 Functions are also objects in JavaScript
10:17 Creating custom constructors with properties (msg, cats)
11:08 Initializing objects from a custom constructor
12:00 Adding methods inside constructors with this keyword
12:49 Running a method on a custom constructor object (msg + cats)
13:15 Functions as objects and constructors in JavaScript
13:30 Built-in constructors (Object, Function, Array, Date)
14:08 Creating and extending your own constructors in JavaScript
14:29 Summary and conclusion
📌 Quick Summary
Learn all the ways to create functions in JavaScript — named functions, anonymous functions, function expressions, and the Function constructor. This tutorial also shows how to build your own custom constructors with properties and methods.
🏷️ Tags
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