Unhandled error from powerbi-client embed event listener is surfaced as global browser Script error

Hi v-achippa 

Sorry for the late reply, I have been quite busy lately.

I have now reproduced the behavior in the Power BI Embedded Analytics Playground using the sample report.

let loadedResolve;
let reportLoaded = new Promise((resolve) => {
    loadedResolve = resolve;
});

let renderedResolve;
let reportRendered = new Promise((resolve) => {
    renderedResolve = resolve;
});

// Capture errors that escape into the browser's global error pipeline.
window.addEventListener("error", function (event) {
    console.error("GLOBAL WINDOW ERROR", {
        message: event.message,
        error: event.error,
        filename: event.filename,
        line: event.lineno,
        column: event.colno
    });
});

window.addEventListener("unhandledrejection", function (event) {
    console.error("GLOBAL UNHANDLED REJECTION", event.reason);
});

// Get Power BI models.
models = window["powerbi-client"].models;

function embedPowerBIReport() {
    let accessToken = EMBED_ACCESS_TOKEN;
    let embedUrl = EMBED_URL;
    let embedReportId = REPORT_ID;
    let tokenType = TOKEN_TYPE;

    let config = {
        type: "report",
        tokenType:
            tokenType === "0"
                ? models.TokenType.Aad
                : models.TokenType.Embed,
        accessToken: accessToken,
        embedUrl: embedUrl,
        id: embedReportId,
        permissions: models.Permissions.All,
        settings: {
            panes: {
                filters: {
                    visible: true
                },
                pageNavigation: {
                    visible: true
                }
            },
            bars: {
                statusBar: {
                    visible: true
                }
            }
        }
    };

    let embedContainer = $("#embedContainer")[0];

    report = powerbi.embed(embedContainer, config);

    report.off("loaded");

    report.on("loaded", function () {
        console.log("Power BI loaded event received");

        loadedResolve();

        throw new Error(
            "Intentional reproduction: error thrown inside Power BI loaded event listener"
        );
    });

    report.off("error");

    report.on("error", function (event) {
        console.error("POWER BI SDK ERROR EVENT", event.detail);
    });

    report.off("rendered");

    report.on("rendered", function () {
        renderedResolve();
        report.off("rendered");
    });
}

embedPowerBIReport();

await reportLoaded;
await reportRendered;

Result:

Power BI loaded event received
GLOBAL WINDOW ERROR
Uncaught Error: Intentional reproduction: error thrown inside Power BI loaded event listener

The stack passes through:

raiseCustomEvent @ powerbi.js
Service.handleEvent @ powerbi.js
receiveMessage @ code-eval-wrapper

The registered Power BI error event is not invoked for this listener exception. This confirms that an exception thrown by a host event listener escapes the SDK event pipeline and reaches the browser’s global error handler.