[IMP] hooks: reintroduce useExternalListener

tests/components/__snapshots__/hooks.test.ts.snap

@@ -212,6 +212,37 @@ exports[`hooks useEffect hook effect with empty dependency list never reruns 1`]
 }"
 `;
 
+exports[`hooks useExternalListener 1`] = `
+"function anonymous(bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, component } = bdom;
+  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, isBoundary, shallowEqual, setContextValue, toNumber } = helpers;
+  
+  let block1 = createBlock(\`<span><block-text-0/></span>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    let d1 = ctx['props'].value;
+    return block1([d1]);
+  }
+}"
+`;
+
+exports[`hooks useExternalListener 2`] = `
+"function anonymous(bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, component } = bdom;
+  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, isBoundary, shallowEqual, setContextValue, toNumber } = helpers;
+  
+  return function template(ctx, node, key = \\"\\") {
+    let b2;
+    if (ctx['state'].flag) {
+      b2 = component(\`MyComponent\`, {}, key + \`__1\`, node, ctx);
+    }
+    return multi([b2]);
+  }
+}"
+`;
+
 exports[`hooks useRef hook: basic use 1`] = `
 "function anonymous(bdom, helpers
 ) {

tests/components/hooks.test.ts

@@ -2,19 +2,20 @@ import {
   App,
   Component,
   mount,
-  useRef,
-  useState,
-  useComponent,
-  useEnv,
-  useSubEnv,
-  useEffect,
   onMounted,
   onPatched,
-  onWillStart,
-  onWillUpdateProps,
   onWillPatch,
-  xml,
+  onWillStart,
   onWillUnmount,
+  onWillUpdateProps,
+  useComponent,
+  useEffect,
+  useEnv,
+  useExternalListener,
+  useRef,
+  useState,
+  useSubEnv,
+  xml,
 } from "../../src/index";
 import { makeTestFixture, nextTick, snapshotEverything } from "../helpers";
 
@@ -287,13 +288,13 @@ describe("hooks", () => {
     ]);
   });
 
-  test.skip("useExternalListener", async () => {
+  test("useExternalListener", async () => {
     let n = 0;
 
     class MyComponent extends Component {
       static template = xml`<span><t t-esc="props.value"/></span>`;
       setup() {
-        //useExternalListener(window as any, "click", this.increment);
+        useExternalListener(window, "click", this.increment);
       }
       increment() {
         n++;