[BUG] Behavior difference for an empty endpointUrl when upgrading from v1 to v2

[MSNev]

In version 1.X when endpointUrl is an “” empty string, AppInsights will fall back to the default endpoint, for example, https://dc.services.visualstudio.com/v2/track. The new version of the SDK doesn’t have this fallback logic, so we need exclude endpointUrl from the AppInsights config when it’s an empty string, to fall back to the default url.

Previously we do

aiConfig = {
    endpointUrl: window.appInsightsV2EndpointUrl ?? null // assign “” to aiConfig endpointUrl anyway
    instrumentationKey: window.appInsightsV2InstrKey
};

now we must check if the url is an empty string

aiConfig = {
    instrumentationKey: window.appInsightsV2InstrKey
};

if (window.appInsightsV2EndpointUrl && window.appInsightsV2EndpointUrl.length !== 0) {  // only configure endpointUrl if url is valid
    aiConfig.endpointUrl = window.appInsightsV2EndpointUrl;
}

[github-actions]

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