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-rw-r--r--src/index.js63
1 files changed, 0 insertions, 63 deletions
diff --git a/src/index.js b/src/index.js
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--- a/src/index.js
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-// @flow
-// An event handler can take an optional event argument
-// and should not return a value
-type EventHandler = (event?: any) => void;
-type WildCardEventHandler = (type: string, event?: any) => void
-
-// An array of all currently registered event handlers for a type
-type EventHandlerList = Array<EventHandler>;
-type WildCardEventHandlerList = Array<WildCardEventHandler>;
-// A map of event types and their corresponding event handlers.
-type EventHandlerMap = {
- '*'?: WildCardEventHandlerList,
- [type: string]: EventHandlerList,
-};
-
-/** Mitt: Tiny (~200b) functional event emitter / pubsub.
- * @name mitt
- * @returns {Mitt}
- */
-export default function mitt(all: EventHandlerMap) {
- all = all || Object.create(null);
-
- return {
- /**
- * Register an event handler for the given type.
- *
- * @param {String} type Type of event to listen for, or `"*"` for all events
- * @param {Function} handler Function to call in response to given event
- * @memberOf mitt
- */
- on(type: string, handler: EventHandler) {
- (all[type] || (all[type] = [])).push(handler);
- },
-
- /**
- * Remove an event handler for the given type.
- *
- * @param {String} type Type of event to unregister `handler` from, or `"*"`
- * @param {Function} handler Handler function to remove
- * @memberOf mitt
- */
- off(type: string, handler: EventHandler) {
- if (all[type]) {
- all[type].splice(all[type].indexOf(handler) >>> 0, 1);
- }
- },
-
- /**
- * Invoke all handlers for the given type.
- * If present, `"*"` handlers are invoked after type-matched handlers.
- *
- * Note: Manually firing "*" handlers is not supported.
- *
- * @param {String} type The event type to invoke
- * @param {Any} [evt] Any value (object is recommended and powerful), passed to each handler
- * @memberOf mitt
- */
- emit(type: string, evt: any) {
- (all[type] || []).slice().map((handler) => { handler(evt); });
- (all['*'] || []).slice().map((handler) => { handler(type, evt); });
- }
- };
-}