Which function is used to parse a string as a JSON object?

The function used to parse a string as a JSON object is JSON.parse(). This function takes a valid JSON string as input and converts it into a corresponding JavaScript object. When working with data that comes in a JSON format, such as data fetched from a server, you often need to convert that string representation into a JavaScript structure that can be easily manipulated within your code.

For example, consider you have a JSON string like '{"name": "John", "age": 30}'. Using JSON.parse() on this string will produce a JavaScript object that you can access with properties like name and age. This operation is crucial for effectively handling and using data that is structured in JSON.

The other options do not serve this purpose. JSON.stringify(), for instance, is used to convert a JavaScript object back into a JSON string, allowing you to prepare data for transmission or storage. JSON.convert() and JSON.object() are not valid methods in the JSON object, thereby making them irrelevant in this context. Understanding the function of JSON.parse() ensures you can efficiently work with JSON data and integrate external data sources into your applications.