isNullish

The isNullish function is a utility method provided by the web3.utils module that allows you to check whether a given value is undefined or null. This function is useful when working with smart contracts that need to handle null or undefined values, as it enables you to easily check whether a value is nullish without having to perform a manual check.

The function takes a single parameter, item, which is the value that you want to check for nullishness. The function then returns a boolean value indicating whether item is undefined or null.

Here's an example usage of the isNullish function:

In this example, the isNullish function is called with three different values: undefined, null, and 'foo'. The function returns true for undefined and null, indicating that they are nullish values, and false for 'foo', indicating that it is not a nullish value.