37 lines
819 B
JavaScript
37 lines
819 B
JavaScript
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function createService() {
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const allHandlers = new Map();
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return {
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on(type, handler) {
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let handlers = allHandlers.get(type);
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if (!handlers) handlers = [handler];
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else handlers.push(handler);
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allHandlers.set(type, handlers);
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},
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off(type, handler) {
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let handlers = allHandlers.get(type);
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if (handlers) {
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handlers.splice(handlers.indexOf(handler) >>> 0, 1);
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}
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},
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emit(type, evt) {
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let handlers = allHandlers.get(type);
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if (handlers) {
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handlers.slice().map((handler) => {
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handler(evt);
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});
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}
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}
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};
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}
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const ThemeService = createService();
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export default ThemeService;
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