From examining this code snippet:
const state = reactive({
user: {
uid: "",
provider: string[],
}
});
The goal is to assign the type string[] to the provider property. However, in this statement, we are actually attempting to set the value of the variable instead of its type. Since string[] is not a valid value, it triggers an error. To assign the value of an array with the type of string[] to the provider property, you should use the following format:
const state = reactive({
user: {
// Initialize as an empty string, and the type will be automatically inferred as string
uid: "",
// Create an empty array and explicitly define its type as an array of strings
provider: [] as string[],
}
});
However, when analyzing how you utilize the state variable:
const user = auth.currentUser;
if (user != null) {
state.user.uid = user.uid || "";
user.providerData.forEach(function(profile) {
state.user.provider.push({ // This part is crucial
providerId: profile.providerId,
uid: profile.uid,
})
});
}
In these lines, you are appending an object with the type
{ providerId: string, uid: string }
to the
state.user.provider array. Therefore, your initial code snippet should actually be:
const state = reactive({
user: {
// Initialize as an empty string, and the type will be automatically inferred as string
uid: "",
// Create an empty array and explicitly define its type as an array of objects with properties providerId and uid
provider: [] as ({ providerId: string, uid: string })[],
}
});
An alternative approach is to employ an interface to specify the shape of this object:
interface ProviderData {
providerId: string;
uid: string;
}
const state = reactive({
user: {
// Initialize as an empty string, and the type will be automatically inferred as string
uid: "",
// Create an empty array and override its type with an array of ProviderData objects
provider: [] as ProviderData[],
}
});