Function watch

tech-study.js:1209–1262

(source, callback, immediate = false)

 * @param callback
 */
const watch = (source, callback, immediate = false) => {
    // 立刻执行
    immediate && callback(unref(source), unref(source));
    // array
    if (Array.isArray(source) && source.every((s) => isRef(s))) {
        for (const i in source) {
            // Proxy
            if (isProxy(source[i])) {
                watch(source[i], () => {
                    const res = source.map((s) => unref(s));
                    callback(res, res);
                });
            }
        }
        watch(() => source.map((s) => unref(s)), callback);
        return;
    }
    // function
    if (source instanceof Function) {
        watch(watchEffectRef(source), (n, o) => {
            callback(unref(n), unref(o));
        });
        return;
    }
    // Proxy
    if (isProxy(source)) {
        for (const key in source) {
            currentSub = () => {
                callback(source, source);
            };
            // sub source
            const subSource = source[key];
            currentSub = undefined;
            watch(subSource, () => {
                callback(source, source);
            });
        }
        return;
    }
    // Ref
    if (isRef(source)) {
        // Ref.value Proxy
        if (isProxy(source.value)) {
            watch(source.value, () => {
                callback(unref(source), unref(source));
            });
        }
        currentSub = callback;
        // 收集依赖
        trackRef(source);
        currentSub = undefined;
        return;
    }
};
/**
 * @description 监听数据变化影响
 * @param callback