Function interceptReads

packages/mobx/src/api/intercept-read.ts:37–58

(thing, propOrHandler?, handler?)

    handler: ReadInterceptor<any>
): Lambda
export function interceptReads(thing, propOrHandler?, handler?): Lambda {
    let target
    if (isObservableMap(thing) || isObservableArray(thing) || isObservableValue(thing)) {
        target = getAdministration(thing)
    } else if (isObservableObject(thing)) {
        if (__DEV__ && !isStringish(propOrHandler)) {
            return die(
                `InterceptReads can only be used with a specific property, not with an object in general`
            )
        }
        target = getAdministration(thing, propOrHandler)
    } else if (__DEV__) {
        return die(`Expected observable map, object or array as first array`)
    }
    if (__DEV__ && target.dehancer !== undefined) {
        return die(`An intercept reader was already established`)
    }
    target.dehancer = typeof propOrHandler === "function" ? propOrHandler : handler
    return () => {
        target.dehancer = undefined
    }
}