diff --git a/types/ember/index.d.ts b/types/ember/index.d.ts index 740ff1308c..c825647e49 100755 --- a/types/ember/index.d.ts +++ b/types/ember/index.d.ts @@ -3442,7 +3442,20 @@ declare module '@ember/component/checkbox' { declare module '@ember/component/helper' { import Ember from 'ember'; export default class Helper extends Ember.Helper { } - export const helper: typeof Ember.Helper.helper; + /** + * In many cases, the ceremony of a full `Helper` class is not required. + * The `helper` method create pure-function helpers without instances. For + * example: + * ```app/helpers/format-currency.js + * import { helper } from '@ember/component/helper'; + * export default helper(function(params, hash) { + * let cents = params[0]; + * let currency = hash.currency; + * return `${currency}${cents * 0.01}`; + * }); + * ``` + */ + export function helper(helperFn: (params: any[], hash?: any) => string): any; } declare module '@ember/component/text-area' { diff --git a/types/ember/test/helper.ts b/types/ember/test/helper.ts index efe3ce33d7..cba5709b10 100755 --- a/types/ember/test/helper.ts +++ b/types/ember/test/helper.ts @@ -25,3 +25,11 @@ const CurrentUserEmailHelper = Ember.Helper.extend({ .get('email'); }, }); + +import { helper } from '@ember/component/helper'; + +function typedHelp(/*params, hash*/) { + return 'my type of help'; +} + +export default helper(typedHelp);