navigator.js

import EventEmitter from "events";
import HookEvent from "./hook.js";

/**
 * @typedef {import('./index').default} UVClient
 */

class NavigatorApi extends EventEmitter {
	/**
	 *
	 * @param {UVClient} ctx
	 */
	constructor(ctx) {
		super();
		this.ctx = ctx;
		this.window = ctx.window;
		this.navigator = this.window.navigator;
		this.Navigator = this.window.Navigator || {};
		this.navProto = this.Navigator.prototype || {};
		this.sendBeacon = this.navProto.sendBeacon;
	}
	overrideSendBeacon() {
		this.ctx.override(this.navProto, "sendBeacon", (target, that, args) => {
			if (!args.length) return target.apply(that, args);
			let [url, data = ""] = args;

			const event = new HookEvent({ url, data }, target, that);
			this.emit("sendBeacon", event);

			if (event.intercepted) return event.returnValue;
			return event.target.call(event.that, event.data.url, event.data.data);
		});
	}
}

export default NavigatorApi;