This content originally appeared on DEV Community 👩💻👨💻 and was authored by Ram Maheshwari ⚡
I created the above animation to help you understand "How The Event Loop Works In JavaScript" 🔥
Took me more than 5 hrs to create this animation for you guys 🦄
Now, let's understand What is Event Loop & How it works 💡
In JavaScript, the event loop is a mechanism that allows the execution of code to be non-blocking. It works by allowing the execution of code to be paused so that other code can run in the meantime ✅
The event loop has a queue of messages, which represent tasks that need to be executed. Each message is a function that is added to the queue by the JavaScript engine or by the developer using methods such as setTimeout() or setInterval() ✅
The event loop continuously checks the queue for new messages, and when one is found, it is removed from the queue and executed. Once the function is executed, the event loop continues to check the queue for more messages ✅
This allows for multiple tasks to be executed in parallel, rather than one task blocking the execution of all other tasks, as it would be in a synchronous environment ✅
In addition, the JavaScript engine also has a call stack, which keeps track of the execution context of each function. When a function is called, it is added to the call stack, and when it completes execution, it is removed from the call stack. The event loop ensures that the call stack remains empty before processing the next message in the queue ✅
Overall, the event loop is responsible for managing the execution of JavaScript code, and it allows for non-blocking I/O, user interface interactions, and other asynchronous operations ✅
Hope this is helpful ✨
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This content originally appeared on DEV Community 👩💻👨💻 and was authored by Ram Maheshwari ⚡
Ram Maheshwari ⚡ | Sciencx (2023-01-28T15:56:29+00:00) I created an animation to understand The Event Loop in JavaScript 🤯🔥. Retrieved from https://www.scien.cx/2023/01/28/i-created-an-animation-to-understand-the-event-loop-in-javascript-%f0%9f%a4%af%f0%9f%94%a5/
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