আপনাকে অসংখ্য ধন্যবাদ "Execution Context" মত একটা টপিককে ডাল ভাতের মতো করে বোঝানোর জন্য | JavaScript এই ধরনের আরো কিছু কনসেপ্ট আছে সেগুলো নিয়ে ভিডিও বানালে আমরা অনেক বেশি উপকৃত হবো। ধন্যবাদ
Another awesome creation by Tapas Dada. Ah, the first 26 minutes laid down the foundation for Callstack, and Dada, you just breezed through it flawlessly!! Loved every bit of it! 😍 Note: Most RU-vidrs kick things off from the callstack (after that initial 26 minutes of this video), but there's some extra sauce on top that only Dada knows.
JavaScript Execution Context: Detailed Breakdown 1. Everything in JavaScript Happens Inside an Execution Context * All JavaScript code runs within an execution context, which provides an environment for the code execution. 2. Global Execution Context (GEC) : * When JavaScript code runs, it first creates a Global Execution Context (GEC). * The GEC acts like a container with two main components: => Memory Component (Variable Environment) => Code Component (Thread of Execution) 3. Phases of Execution Context Creation : * The GEC undergoes two phases: => Creation Phase (Memory Creation Phase) => Execution Phase (Code Execution Phase) 4. Memory Creation Phase : * JavaScript code is processed line by line. * During the Memory Creation Phase, it allocates memory for variables and functions: * Variables are stored as key-value pairs. * Initially, variables are assigned a value of undefined. * Functions are stored in their entirety, including their code. 5. Execution Phase * In this phase, the actual code executes line by line. * Variables are assigned their actual values, replacing undefined. 6. Function Execution Context : * When a function is invoked (called), a new execution context is created within the GEC. * This new context undergoes the same phases: => Memory Creation Phase : Allocates memory for parameters and local variables, initially setting them to undefined. => Execution Phase : Executes the function code line by line, assigning actual values to variables. * Once the function completes execution, its context is removed, and control returns to the GEC. 7. Call Stack : * The Call Stack manages the order of execution contexts. * The GEC is the first entry in the Call Stack. * When a new execution context is created (e.g., a function is called), it is added to the top of the Call Stack. * Once execution is completed, the context is removed from the stack, and control returns to the previous context. * When the entire program completes, the Call Stack becomes empty. 8. Different Names for the Call Stack : * The Call Stack, a LIFO (Last In, First Out) data structure, is also known as: => Call Stack => Execution Context Stack => Program Stack => Machine Stack => Control Stack 9. JavaScript Code Analysis : * Before execution, JavaScript code is analyzed and broken into parts known as tokens (tokenization). * An Abstract Syntax Tree (AST) is created from these tokens. * The JavaScript engine uses the AST to convert the code into machine code. 10. Global Execution Context Without Code : * Even if no code is present, JavaScript still creates a Global Execution Context. * The initial state of the GEC contains: => window (Global Object) => this keyword, which refers to the global object in the global context * console.log(window === this); => Output : true Thanks @tapascript-bangla
Javascript engine er modhe ki hoche setar jonno onek video dekhechi kintu puropuri bujte pari ni tai javascript er upor valo laga kaj kare ni apner video dekhe onektai bujte parchi vetore ki hoche. Dhonno bad dada ei rokum content dear jonno ❤.javascript er upor aro video chai basic core bisoyer upor eto din ondhokare dil churar mato amar obosta chilo.
Truly nice explanation dada 😍 Hope that, you will be consistent about this basic concept like how javascript garbage works, events & event loop, error handling, etc.
I will be waiting for the event loop and closure, these look easy but are hard to understand and execute properly. Please consider these topics also in the next video.
Dada tomar English channel tar subscribe ami, khub bhalo laglo ai channel ta suggestions dekha pore. Dada khub bhalo kaj korcho Tumi Bengali community jonno jara Bangla bhalo bhabe bujhte pare. Please dada JavaScript eeee series ektu joldi video diyeao. Thank you Dada for this Wonderful channel.
Prosenjit, thank you vai... amar english channeler subscriber hoyar jonyo and support korar jonyo. Asha kori, oi content gulo tomar kaje ashe 🙂 Bangla community and developer der jonyo kichu korte pere ami gorbito. 2 to channel e cholbe soman bhabe... vai, tomader jana suna der modhye amar channel dutor kotha share koro 🙏 JavaScript er series ar baki vido aro taratari asbe June theke... amar course ta pray sesher pothe... tarpore ami free. Thanks!
@@tapascript-bangla Sotti bolchi dada ami j ki khusi holam ai channel ta subscribe kore se ar bolle bojhate parbo naa dada. Acha dada tumi ki Porao Private eee JavaScript
