Function set

packages/mobx/src/api/object-api.ts:84–119

(obj: any, key: any, value?: any)

export function set<T extends Object>(obj: T, values: { [key: string]: any })
export function set<T extends Object>(obj: T, key: PropertyKey, value: any)
export function set(obj: any, key: any, value?: any): void {
    if (arguments.length === 2 && !isObservableSet(obj)) {
        startBatch()
        const values = key
        try {
            for (let key in values) {
                set(obj, key, values[key])
            }
        } finally {
            endBatch()
        }
        return
    }
    if (isObservableObject(obj)) {
        ;(obj as any as IIsObservableObject)[$mobx].set_(key, value)
    } else if (isObservableMap(obj)) {
        obj.set(key, value)
    } else if (isObservableSet(obj)) {
        obj.add(key)
    } else if (isObservableArray(obj)) {
        if (typeof key !== "number") {
            key = parseInt(key, 10)
        }
        if (key < 0) {
            die(`Invalid index: '${key}'`)
        }
        startBatch()
        if (key >= obj.length) {
            obj.length = key + 1
        }
        obj[key] = value
        endBatch()
    } else {
        die(8)
    }
}

export function remove<K, V>(obj: ObservableMap<K, V>, key: K)
export function remove<T>(obj: ObservableSet<T>, key: T)