Question:
invariant violation: new nativeeventemitter() requires a non-null argument. Please explain the answer in detail with examples.
Answer:
An “invariant violation” error is usually thrown in JavaScript when a certain condition or requirement is not met in the code. In this specific case, the error message is related to the nativeeventemitter constructor.
The error message states that the new nativeeventemitter() constructor requires a non-null argument, meaning that you need to provide a valid value when creating a new instance of the nativeeventemitter object. Passing a null value or not passing any argument at all will trigger this error.
Here is an example to illustrate the error:
// Example 1 - Incorrect usage triggering the error
const eventEmitter = new nativeeventemitter(null); // or new nativeeventemitter()In the above example, the nativeeventemitter() constructor is called with a null argument, which violates the requirement of a non-null argument.
To fix the error, you need to provide a valid non-null argument. This could be any object or value that is appropriate for the intended use of the nativeeventemitter. Here’s an updated example:
// Example 2 - Correct usage
const eventEmitter = new nativeeventemitter(someOptions);In the above updated example, someOptions is a non-null argument that satisfies the requirement of the nativeeventemitter() constructor.
To summarize, the “invariant violation” error occurs when the nativeeventemitter() constructor is called without a valid non-null argument. You need to provide a valid value to fix the error and create a new instance of the nativeeventemitter object.