Happy Rawat Javascript Interview Questions Pdf Free Download 'link' — High-Quality

Promises are objects representing eventual completion (or failure) of an async operation. They prevent "callback hell" and allow chaining with .then() and .catch() .

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: Closures, prototypal inheritance, hoisting, and the event loop. Asynchronous JS : Promises, async/await , and generators. Modern Features (ES6+) and generators. Modern Features (ES6+)