I'm trying to better understand object relationships in Javascript. I have the following object:
var product = {id: 1, name: 'Test Product', sku: {id: 2, sku: 'ABC'}};
Now, I also set the following variable:
var appSku = product.sku;
If product.sku changes to a new object, will appSku update? Meaning, if somewhere else in the code I do this:
product.sku = {id: 3, sku: 'EFG'};
How can I ensure that the appSku variable gets the new value of product.sku?
If
product.skuchanges to a new object, willappSkuupdate?
No
How can I ensure that the
appSkuvariable gets the new value ofproduct.sku?
You would have to write it as a function accesses sku via a reference to the Object product, e.g.
var appSku = (function (o) {
return function () {
return o.sku;
}
}(product));
And always use appSku()
This isn't really helpful in your case, though as using product.sku directly is much cleaner
This said, if product.sku is not changed to a new Object, but rather the previous one just has it's properties modified then appSku and product.sku would still be the same thing
