**Understanding Promises in JavaScript**

Promises are a fundamental concept in asynchronous programming in JavaScript, allowing developers to handle the results of asynchronous operations. A promise represents a value that may be available now, or in the future, or never. The promise life cycle consists of three stages: pending, fulfilled, and rejected.

A promise is created using the `new Promise` constructor, which takes a function with two arguments: resolve and reject. These functions are called when the operation is successful (fulfilled) or fails (rejected), respectively.

In this example, we see how promises can be chained to simulate fetching data step by step. By handling errors in the `.catch()` block, developers can ensure that their code remains clean and predictable.

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Source: https://dev.to/dianalanciano/promise-in-javascript-79p