Salesforce JavaScript Developer Practice Exam

What does JSON.stringify do?

1. Create a JavaScript object from a JSON string

2. Convert JavaScript objects or values to a JSON string

3. Convert JSON to XML format

4. Log JSON objects to the console

The correct answer is: Convert JavaScript objects or values to a JSON string

The function JSON.stringify is used to convert JavaScript objects or values into a JSON string format. This is essential for cases where data needs to be transmitted, such as between a client and a server, or when storing data in a format that can be easily parsed later. For example, when you have a JavaScript object that represents a user's profile, using JSON.stringify will convert that object into a JSON string that can then be sent over an HTTP request or saved into local storage. This transformation is crucial because it allows for the preservation of the object's structure in a way that is universally readable and can be used across different programming environments. Generating a JSON string from a JavaScript object helps ensure that the data is structured correctly and can be easily reconstructed back to the original object state using JSON.parse. Additionally, JSON.stringify offers options to control the output format, such as indentation or removing certain properties, enhancing its utility in data management and communication.