"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const isEventTarget_1 = __importDefault(require("./isEventTarget"));
const eventOptionsSupported_1 = __importDefault(require("./eventOptionsSupported"));
function on(elm, eventNames, handler, options) {
    if (!isEventTarget_1.default(elm)) {
        options = handler;
        handler = eventNames;
        eventNames = elm;
        elm = document;
    }
    const opts = eventOptionsSupported_1.default()
        ? options
        : !!(options && options.capture);
    if (!Array.isArray(eventNames)) {
        eventNames = [eventNames];
    }
    eventNames.forEach((evt) => elm.addEventListener(evt, handler, opts));
    return elm;
}
exports.default = on;