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  • David Boukhors - Girafe
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8 replies

Canvas app in Lightning component showing blank screen every second time

Hi
I have a problem with canvas app on lightning component. Sometimes my canvas app is blank.

Here is an example of my lightning component :

<aura:component implements="force:appHostable" >
    <aura:handler name="init" action="{!c.doInit}" value="{!this}" />
    <force:canvasApp developerName="MyCanvas" applicationName="MyCanvas"  canvasId="Canvas" aura:id="Cars" border="yes" width="100%" height="600"  scrolling="yes"  namespacePrefix=""/>
</aura:component>

Scenario when not working:

If I open my canvas app from Salesforce Lightning Experience app luncher at first

Salesforce Lightning Experience app luncher -> MyApp -> MyCanvasAppTab

My canvas app is being fully loaded to iframe and i can work with it.

If now i  open again my canvas app again using Salesforce Lightning Experience app luncher

Salesforce Lightning Experience app luncher -> MyApp -> MyCanvasAppTab

At this time my canvas app is blank and in iframe i see only blank tags <title></title><body></body>.
I've checked that I'm connected to my external app and return data by canvas app request.

If now I refresh the page with canvas app I see my external up again.

Can somebody help me, please?

Thanks.