Learn how to resolve the issue of "Property 'item' does not exist on type 'never'." in Angular using TypeScript with the following code snippet

addToCart (event: any) {
    if ("cart" in localStorage) {
      this.cartProducts = JSON.parse(localStorage.getItem("cart")!)
      console.log(event);
      let exist = this.cartProducts.find(item => item.item.id == event.item.id);
      if(exist) {
        alert("This product is already in your cart");
      } else {
        this.cartProducts.push(event);
        localStorage.setItem("cart" , JSON.stringify(this.cartProducts));
      }
    }else {
      this.cartProducts.push(event);
      localStorage.setItem("cart" , JSON.stringify(this.cartProducts));
    }    
  }

Your unique content goes here.

I attempted to address this issue using type annotation, but unfortunately, I was unable to find a quick solution. It seems there is no easy fix for this problem at the moment.

Answer №1

Assuming that you are not inputting cartProducts and starting with an empty array.

cartProducts = []

The default type is never[]. For more information, refer to Understanding the "not assignable to parameter of type never" error in TypeScript?

You should specify the type like this:

cartProducts: ICartProduct[] = []

Avoid using the any type as it defeats the purpose of typescript in catching errors effectively.

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