web: update to new formatting rules, make eslint warnings fail ci

web/src/utils.ts

@@ -1,3 +1,5 @@
+import { html, TemplateResult } from "lit-html";
+
 export function getCookie(name: string): string | undefined {
     let cookieValue = undefined;
     if (document.cookie && document.cookie !== "") {
@@ -28,3 +30,7 @@ export function truncate(input?: string, max = 10): string {
 
     return array.slice(0, max).join(" ") + ellipsis;
 }
+
+export function htmlFromString(...strings: string[]): TemplateResult {
+    return html({ raw: strings, ...strings } as TemplateStringsArray);
+}