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export class AbstractEventTarget { |
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constructor() { |
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this.listeners = {}; |
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} |
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addEventListener(type, callback, _options) { |
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if (!this.listeners[type]) { |
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this.listeners[type] = []; |
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} |
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this.listeners[type].push(callback); |
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} |
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dispatchEvent(event) { |
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if (!this.listeners[event.type] || this.listeners[event.type].length === 0) { |
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return true; |
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} |
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this.listeners[event.type].forEach(listener => { |
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listener(event); |
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}); |
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return true; |
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} |
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removeEventListener(type, callback, _options) { |
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if (!this.listeners[type]) { |
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return; |
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} |
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const index = this.listeners[type].indexOf(callback); |
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if (index !== -1) { |
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this.listeners[type].splice(index, 1); |
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} |
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} |
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} |
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