ES6 to javascript backwards compatible

[hungvuong1003]

When trying to load the embedded report in the Chrome version 44, I met this issue

reportEmbed:104 Uncaught SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
reportEmbed:257 Uncaught SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
reportEmbed:478 Uncaught ReferenceError: uid is not defined
reportEmbed:488 Uncaught ReferenceError: powerbi is not defined

...

reportEmbed.min.js:1 ERROR ReferenceError: clusterUri is not defined
at Object.t [as createReportEmbedTelemetryHostService] (https://app.powerbi.com/13.0.7149.169/scripts/reportembed.bundle.min.js:29:20684)
at Object.<anonymous> (https://app.powerbi.com/13.0.7149.169/scripts/reportembed.bundle.min.js:28:5742)
at Object.invoke (https://app.powerbi.com/13.0.7149.169/scripts/reportembed.externals.bundle.min.js:561:390)
at Object.$get (https://app.powerbi.com/13.0.7149.169/scripts/reportembed.externals.bundle.min.js:559:3)
at Object.invoke (https://app.powerbi.com/13.0.7149.169/scripts/reportembed.externals.bundle.min.js:561:390)
at https://app.powerbi.com/13.0.7149.169/scripts/reportembed.externals.bundle.min.js:563:158
at d (https://app.powerbi.com/13.0.7149.169/scripts/reportembed.externals.bundle.min.js:560:310)
at e (https://app.powerbi.com/13.0.7149.169/scripts/reportembed.externals.bundle.min.js:561:39)
at Object.invoke (https://app.powerbi.com/13.0.7149.169/scripts/reportembed.externals.bundle.min.js:561:124)
at https://app.powerbi.com/13.0.7149.169/scripts/reportembed.externals.bundle.min.js:563:158J @ reportEmbed.min.js:1
reportEmbed.min.js:1 ERROR Error: Uncaught (in promise): ReferenceError: clusterUri is not defined

PowerBI web portal is using ES6 syntax in https://app.powerbi.com/13.0.7149.169/scripts/reportembed.bundle.min.js. And the browser does not support it yet. It causes the issue.

Do we have a configuration option to tell PowerBI server to load an javascript backwards compatible version instead?

Any ideas? Thanks.