While learning from an online tutorial, I came across a situation where the predefined value of the function was set as null for data and details. I'm curious about the significance of using null here. Can you clarify what it means?
onClick={(data, details = null) => {
console.log(data.description, details);
}}
Understanding the concept of using null as a parameter in JavaScript is important, and this article explains it in detail.
There are various reasons for setting default values to null:
if(details){}I hope this explanation clarifies any doubts you may have.
null is considered a falsey value in JavaScript, while an empty object (created with {}) is truthy.
In many cases, developers use null to indicate that a parameter should be an object because typeof null === "object". Without setting details = null, a missing details parameter would be undefined, which is a distinct type (typeof undefined === "undefined").
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