poMocker.js

(function () {
    const root = typeof unsafeWindow !== "undefined" ? unsafeWindow : window;

    let tokenId = undefined;
    let updateFunction = undefined;
    Object.defineProperty(root, "forcePoTokenId", {
        get: () => tokenId,
        set: (value) => {
            tokenId = value;
            if (typeof updateFunction === "function") updateFunction();
        },
    });

    const initPoTokenMocker = (flags) => {
        const interval = flags.html5_session_po_token_interval_time_ms - 0 || 0;
        flags.html5_session_po_token_interval_time_ms = "529453054";
        const setInterval = root.setInterval;
        root.setInterval = function (func, delay, ...args) {
            if (delay !== 529453054)
                return setInterval.call(this, func, delay, ...args);
            if (typeof func === "function") {
                updateFunction = function () {
                    flags.html5_mock_content_binding_for_session_token =
                        tokenId;
                    func();
                };
                updateFunction();
            }
            return interval !== 0
                ? setInterval.call(this, func, interval, ...args)
                : undefined;
        };
    };

    Object.defineProperty(Object.prototype, "html5_web_po_request_key", {
        get: function () {
            delete Object.prototype.html5_web_po_request_key;
            initPoTokenMocker(this);
            return undefined;
        },
        set: function (value) {
            delete Object.prototype.html5_web_po_request_key;
            initPoTokenMocker(this);
            return (this.html5_web_po_request_key = value);
        },
        enumerable: false,
        configurable: true,
    });

    return window;
})();

examples
window.forcePoTokenId = undefined // use default id
window.forcePoTokenId = '111111111111111111111||' // use specific id