I have utilized the following code:
data?.response[0]?.Transaction[0]?.UID;
In this scenario, the Transaction key is not present, resulting in the error message:
ERROR TypeError: Cannot read properties of undefined (reading '0')
Instead of checking for null or undefined using an if statement, I attempted to utilize Optional Chaining.
Learn about optional chaining and how it can be used with array indexes:
data?.response?.[0]?.Transaction?.[0]?.UID
Here's a practical example to demonstrate how optional chaining works in JavaScript:
const obj = {
arr: [1]
};
console.log('Exists:', obj?.arr?.[0]);
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