41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
export default function(EventTarget, P = Promise) {
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const handler = function(e) {
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if (e.key === this.configuration.key) {
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P.resolve(this.getCurrentEvent()).then(event => {
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this.configuration.cursor++;
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this.dispatchEvent(event);
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});
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}
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};
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return class extends EventTarget {
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constructor(cb, configuration) {
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super(...arguments);
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this.source = cb;
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this.handler = handler.bind(this);
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this.configuration = configuration;
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this.configuration.cursor = 1;
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this.dispatcher = configuration.dispatcher;
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this.open();
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}
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dispatchEvent() {
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if (this.readyState === 1) {
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return super.dispatchEvent(...arguments);
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}
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}
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close() {
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this.dispatcher.removeEventListener('storage', this.handler);
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this.readyState = 2;
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}
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reopen() {
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this.dispatcher.addEventListener('storage', this.handler);
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this.readyState = 1;
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}
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getCurrentEvent() {
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return {
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type: 'message',
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data: this.source(this.configuration),
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};
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}
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};
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}
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