Move once to events namespace

spec/once.spec.js → spec/events/once.spec.js

@@ -1,4 +1,4 @@
-import { once } from "../src";
+import { once } from "../../src";
 
 describe("once", () => {
   let subject;

src/events/once.js

@@ -0,0 +1,21 @@
+/* @flow */
+
+import type { EventListener, EventType } from "../types";
+
+function once(
+  element: Element,
+  eventType: EventType,
+  listener: EventListener
+): () => void {
+  function wrappedListener(event) {
+    element.removeEventListener(eventType, wrappedListener);
+
+    listener(event);
+  }
+
+  element.addEventListener(eventType, wrappedListener);
+
+  return () => element.removeEventListener(eventType, wrappedListener);
+}
+
+export default once;

src/index.js

@@ -1,13 +1,14 @@
 /* @flow */
 
-import type { EventType, Selector } from "./types";
+import type { EventListener, EventType, Selector } from "./types";
 
 import { html, body } from "./aliases";
 import addClass from "./css/add-class";
 import hasClass from "./css/has-class";
 import removeClass from "./css/remove-class";
 import toggleClass from "./css/toggle-class";
 import on from "./events/on";
+import once from "./events/once";
 import query from "./queries/query";
 import queryAll from "./queries/query-all";
 import matches from "./traversing/matches";
@@ -20,8 +21,6 @@ import parentsBy from "./traversing/parents-by";
 
 type EventDetails = { [key: string]: mixed };
 
-type EventListener = (event: Event) => mixed;
-
 type PredicateFn = (element: Element) => boolean;
 
 /* Dataset */
@@ -117,22 +116,6 @@ function remove(element: Element): boolean {
 
 /* Events */
 
-function once(
-  element: Element,
-  eventType: EventType,
-  listener: EventListener
-): () => void {
-  function wrappedListener(event) {
-    element.removeEventListener(eventType, wrappedListener);
-
-    listener(event);
-  }
-
-  element.addEventListener(eventType, wrappedListener);
-
-  return () => element.removeEventListener(eventType, wrappedListener);
-}
-
 function delegate(
   element: Element,
   selector: Selector,

src/types.js

@@ -4,6 +4,8 @@ export type CSSClass = string;
 
 export type Elements = Array<Element>;
 
+export type EventListener = (event: Event) => mixed;
+
 export type EventType = string;
 
 export type Predicate = (element: Element) => boolean;