Why ‘this.userid’ is assigning undefined value? does "this" pointing to the class or the object itself? timestamp_generate_function() works though.
class price_update {
constructor(api_key, url_endpoint, user_id, store_name) {
this.api_key = api_key;
this.url_endpoint = url_endpoint;
this.userid = user_id;
this.store_name = store_name;
}
#updatePriceQuantity_parameters = {
Action: "UpdatePriceQuantity",
Format: "json",
Timestamp: this.#timestamp_generate_function(),
UserID: this.userid,
Version: "1.0"
};
>Solution :
does "this" pointing to the class or the object itself?
Yes. this points to the object itself.
Why ‘this.userid’ is assigning undefined value?
You are attempting to set the value based on a property (this.userid) before you’ve ever defined it (either in the constructor or anywhere else).
Instead, you will want to do something like this in your constructor:
class price_update {
constructor(api_key, url_endpoint, user_id, store_name) {
this.api_key = api_key;
this.url_endpoint = url_endpoint;
this.userid = user_id;
this.store_name = store_name;
this.#updatePriceQuantity_parameters.UserID = user_id;
}
#updatePriceQuantity_parameters = {
Action: "UpdatePriceQuantity",
Format: "json",
Timestamp: this.#timestamp_generate_function(),
UserID: '',
Version: "1.0"
};
Note that we’re setting the value in the constructor while we’re inside of the instance of the object itself. You can do it like this, or in another method if you like. Either way, you have to instantiate the object first before you and access/apply properties that you have set during construction.