@angular/core

Resource

interface

A Resource is an asynchronous dependency (for example, the results of an API call) that is managed and delivered through signals.

API

  
    interface Resource<T> {}

value

Signal<T>

The current value of the Resource, or undefined if there is no current value.

status

Signal<ResourceStatus>

The current status of the Resource, which describes what the resource is currently doing and what can be expected of its value.

error

Signal<unknown>

When in the error state, this returns the last known error from the Resource.

isLoading

Signal<boolean>

Whether this resource is loading a new value (or reloading the existing one).

hasValue

this is Resource<Exclude<T, undefined>>

Whether this resource has a valid current value.

This function is reactive.

@returnsthis is Resource<Exclude<T, undefined>>

reload

boolean

Instructs the resource to re-load any asynchronous dependency it may have.

Note that the resource will not enter its reloading state until the actual backend request is made.

@returnsboolean

Description

A Resource is an asynchronous dependency (for example, the results of an API call) that is managed and delivered through signals.

The usual way of creating a Resource is through the resource function, but various other APIs may present Resource instances to describe their own concepts.