How to clone anything in JavaScript
We used to do all sorts of stuff in JavaScript land in regards to cloning.
Why?
Because ..references.
Primitive types (strings, numbers, booleans..) are always correctly โclonedโ because they are passed by value.
Everything else (objects, arrays, dates, whatever) is an object. And objects are passed by reference.
So we had to do deep cloning using various ways otherwise you end up with the same object reference, under a different name.
But itโs 2023 and we can use structuredClone().
const b = structuredClone(a)
This also deeply clones non-primitive types.
Just pay attention itโs a recent API, so if you use it in the browser make sure you use a build tool that provides core-js (babel) polyfills.
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