Symbol.observable is undefined

[brucemcpherson]

Using Node v20.11.1

This function in distribution/index.js

export function isObservable(value) {
    if (!value) {
        return false;
    }
    // eslint-disable-next-line no-use-extend-native/no-use-extend-native, @typescript-eslint/no-unsafe-call
    if (value === value[Symbol.observable]?.()) {
        return true;
    }
    // eslint-disable-next-line @typescript-eslint/no-unsafe-call
    if (value === value['@@observable']?.()) {
        return true;
    }
    return false;
}

Cause objects being tested - for example is(myObject) - to try to fetch an 'undefined' property from myObject, as Symbol.observable is undefined

This causes a problem when testing an object which is a proxy with property validity checking built in.

[brucemcpherson]

wow - super quick fix. Thank you !!