chore: improve dev tasks

1 files changed, 45 insertions, 0 deletions

diff --git a/apps/web/src/element.ts b/apps/web/src/element.ts
new file mode 100644
index 0000000..6299d2f
--- /dev/null
+++ b/apps/web/src/element.ts
@@ -0,0 +1,45 @@
+import { createElement, type CreateElement } from "./html";
+
+export default class NotiveElement extends HTMLElement {
+  static makeFactory<T extends NotiveElement>(this: {
+    new (): T;
+  }): CreateElement<T>;
+
+  static makeFactory(): any {
+    throw new Error(
+      "Missing makeFactory implementation. Did you forget to use @customElement?",
+    );
+  }
+}
+
+export function customElement(tagName: string) {
+  return function (_value: unknown, context: ClassDecoratorContext) {
+    context.addInitializer(function () {
+      window.customElements.define(tagName, this as typeof NotiveElement);
+      (this as typeof NotiveElement).makeFactory = () =>
+        ((...args: any[]) => createElement(tagName, ...args)) as CreateElement<any>;
+    });
+  };
+}
+
+export function eventHandler(eventName: string) {
+  return function (_value: unknown, context: ClassFieldDecoratorContext) {
+    const privateKey = Symbol(context.name.toString());
+
+    context.addInitializer(function () {
+      Object.defineProperty(this, context.name, {
+        get() {
+          return this[privateKey];
+        },
+        set(handler) {
+          const oldHandler = this[privateKey];
+          if (oldHandler) this.removeEventListener(eventName, oldHandler);
+          this[privateKey] = handler;
+          if (handler) this.addEventListener(eventName, handler);
+        },
+        enumerable: true,
+        configurable: true,
+      });
+    });
+  };
+}