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types: making ComputedRef types inline with vue3 and provide ComputdRef type #310

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types: making ComputedRef types inline with vue3 and provide ComputdRef type #310

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12 changes: 9 additions & 3 deletions src/apis/computed.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -8,14 +8,20 @@ interface Option<T> {
set: (value: T) => void;
}

export interface ComputedRef<T = any> extends WritableComputedRef<T> {
readonly value: T;
}

interface WritableComputedRef<T> extends Ref<T> {}

// read-only
export function computed<T>(getter: Option<T>['get']): Readonly<Ref<Readonly<T>>>;
export function computed<T>(getter: Option<T>['get']): ComputedRef<T>;
// writable
export function computed<T>(options: Option<T>): Ref<Readonly<T>>;
export function computed<T>(options: Option<T>): WritableComputedRef<T>;
// implement
export function computed<T>(
options: Option<T>['get'] | Option<T>
): Readonly<Ref<Readonly<T>>> | Ref<Readonly<T>> {
): ComputedRef<T> | WritableComputedRef<T> {
const vm = getCurrentVM();
let get: Option<T>['get'], set: Option<T>['set'] | undefined;
if (typeof options === 'function') {
Expand Down