If you are a javascript developer then you definitely know about try-catch block which is used to deal with errors. But now you can use new Safe Assignment operator proposal (?=)
try-catch blocks lead to nested code making it harder to read and maintain.
?= operator reduces nesting and it gives result of function into tuple.
If an error occurs, it returns [error,null]otherwise it returns [null, result].
Example-
async function fetchData() {
const [error, response] ?= await fetch("https://api.example.com/data");
if (error) return handleError(error);
return response;
}
Better Error Handling
Placing the error first in the [error, data] ?= structure ensures that errors are handled before processing data, reducing the risk of ignoring errors.
const [error, data] ?= await fetch("https://api.example.com");
Inspired from Rust
The pattern of ?= is inspired from Rust which have more structured error handling.
Summary
The Safe Assignment Operator (?=) is a game-changer for JavaScript error handling, promising to reduce the need for clunky try-catch blocks and make your code cleaner and more secure.
Top comments (2)
This is from a draft proposal, which hasn't even been accepted for consideration yet - let alone inclusion in the language. It's a very long way from becoming a part of JS - and might not be accepted for inclusion.
still have a long way to go