Guard for contentWindow == null (#930)

This commit is contained in:
Paulus Schoutsen 2018-02-26 11:44:15 -08:00 committed by GitHub
parent ff658c86ff
commit 9f3458fcd1
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

View File

@ -54,7 +54,7 @@ class HaPanelHassio extends
}
_updateProperties(data) {
const setProperties = this.$.iframe.contentWindow.setProperties;
const setProperties = this.$.iframe.contentWindow && this.$.iframe.contentWindow.setProperties;
// Delay calling setProperties until iframe loaded
if (!setProperties) {