TypeError: Cannot read properties of undefined (reading '_id') about ecommerce_sanity_stripe HOT 8 OPEN

You just need to return item , in this particular part of onAdd function. as shown below

if (checkProductInCart) {
const updatedCartItems = cartItems.map((item) => {
if (item._id === product._id)
return {
...item,
quantity: item.quantity + quantity,
};
{
return item;
}
});

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I found the same issue, can someone provide the fix for this error ?

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@adrianhajdin, hey man could you look at this issue for us

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The fixes for these issues are already provided in the issue section, the only thing I couldn't find is how to reset the quantity back to 1 once we move on to another product

product A = quantity 4

when click on another product

the quantity is still 4 and doesn't revert back to it's initial state which is "1"

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hi Foor3y3s ,
Thanks for your help,
Could you tell me which issue it was

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The error "Property does not exist on type 'never'" occurs when we try to access a property on a value of type never or when TypeScript gets confused when analyzing our code. To solve the error, use square brackets to access the property. e.g.

const onAdd = (product, quantity) => {
const checkProductInCart = cartItems.find((item) => item['_id'] === product._id);

In short, do obj['myProperty'], instead of obj.myProperty.

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I am also facing a similar kind of error: if any of you could help me with this I am putting the video link https://www.loom.com/share/701a8b0c08144b34b4876296aa9a0a0c

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You just need to return item , in this particular part of onAdd function. as shown below

if (checkProductInCart) { const updatedCartItems = cartItems.map((item) => { if (item._id === product._id) return { ...item, quantity: item.quantity + quantity, }; { return item; } });

This worked for me, thanks!

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