JavaScript Promises Explained for Beginners

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Summary of Key Points

1. Promise Basics:

   • A Promise represents a value that may not be available yet but will be resolved (or rejected) at some point in the future.
   • It has three states: pending, fulfilled, and rejected.

2. Creating Promises:

   • You create a new Promise using the constructor, which takes a function with two parameters (resolve and reject). Inside this function, you call either resolve(value) or reject(reason) to change the state of the promise.

3. Handling Promises:

   • Use .then() to handle fulfilled promises.
   • Use .catch() to handle rejected promises.
   • Each .then() returns a new Promise, allowing for chaining.

4. Chaining Promises:

   • You can chain multiple .then() calls together, where each subsequent .then() receives the result of the previous one as its input.

Example: Chaining Promises

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