render guard

2019-02-23 14:14:30 -06:00
parent 5a6297f975
commit 505c1841d3
1 changed files with 5 additions and 1 deletions
@@ -25,7 +25,11 @@ class BOILERPLATECard extends LitElement {
    this._config = config;
  }

-  protected render(): TemplateResult {
+  protected render(): TemplateResult | void {
+    if (!this._config || !this.hass) {
+      return html``;
+    }
+
    return html`
      <div>BOILERPLATE</div>
    `;