undefined vs not defined in JavaScript | Simplified Explanation скачать в хорошем качестве

undefined vs not defined in JavaScript | Simplified Explanation

Are you confused about the difference between undefined and not defined in JavaScript? 🤔 In this video, we'll clarify the difference between: ✨ Undefined: when a variable has been declared but has no value ✨ Not Defined: when a variable has not been declared at all We'll also cover: ✨ How to check for undefined and not defined variables ✨ How to avoid common pitfalls and errors ✨ Best practices for declaring and using variables in JavaScript Whether you're a beginner or experienced developer, this video will help you master the fundamentals of JavaScript variables and avoid common mistakes. 💻 #JavaScript #Undefined #NotDefined #JavaScriptVariables #WebDevelopment #Programming Understand the difference between undefined and not defined in JS. Many developers assume that undefined is exactly the same as not defined, but that's not true. undefined is a value in JavaScript and in fact, it also takes up memory space. Along with that we will see "is not defined" "cannot access before initialization.." "null" "NaN" in the video it's important to understand all these things to do better debugging in javascript Time stamps 00:00 -undefined 04:10 -is not defined 05:15 -cannot access before initialization.. 08:01 -Temporal dead Zone 08:13 -null 09:14 -Type of null and undefined 10:04 -"==" and "===" 11:16 -Nan if you have any questions please comment them below Support me -- Please hit the like and consider subscribing guys Would love to Stay Connected with you ❤️ instagram.com/sathellisrikanth_