el-beeswarm/.scannerwork/css-bundle/node_modules/htmlparser2/lib/ProxyHandler.js

<div style="display: flex; padding: 1rem; flex-direction: column; align-items: center; justify-content: center; height: 100vh; text-align: center; display: flex;

module.exports = ProxyHandler;

function ProxyHandler(cbs) {
    this._cbs = cbs || {};
}

var EVENTS = require("./").EVENTS;
Object.keys(EVENTS).forEach(function(name) {
    if (EVENTS[name] === 0) {
        name = "on" + name;
        ProxyHandler.prototype[name] = function() {
            if (this._cbs[name]) this._cbs[name]();
        };
    } else if (EVENTS[name] === 1) {
        name = "on" + name;
        ProxyHandler.prototype[name] = function(a) {
            if (this._cbs[name]) this._cbs[name](a);
        };
    } else if (EVENTS[name] === 2) {
        name = "on" + name;
        ProxyHandler.prototype[name] = function(a, b) {
            if (this._cbs[name]) this._cbs[name](a, b);
        };
    } else {
        throw Error("wrong number of arguments");
    }
});