Error when render() is called before set hass(hass) (i.e. before this._hass is set)

Thanks for giving us this super-awesome component!

There is an issue I wish to report along with a proposed solution.

I’m seeing that mostly the render() method is called before set hass(hass). This means that current() (called from render) does not have this._hass to work upon, so it throws an error, and prevents the rendering of the subsequent html in render().

On making these two changes, my testing has shown good results.

1. In the beginning of render():

   if (!this.config || !this._hass) return html``;  // checking .config is also not a bad idea
   

2. With above, we want render() to be called again when set hass(hass) is called. This can be done by watching this._hass property, and the following getter will do that:

   static get properties() {
     return {
       _hass: {},
       config: {},
     };
   }
   

[markusg1234]

Thankyou, it has fixed my issue. Regards, Markus

[DavidFW1960]

Ok I’ve merged that into master. If you use HACS just pull master for now. I’ll bump the version and in a few days if you both (and I) have no issues I’ll do a release