lushijie

function x() {
  console.log('x')
};
function y() {
  console.log('y')
};
var z = 3;
(z==3?x:y)();

lushijie

    function chainable(fn) {
      console.info('a', this);//window
      return function () {
        console.info('b1', this);
        fn.apply(this, arguments);
        console.info('b2', this);
        return this;
      };
    }

lushijie

const privateProps = new WeakMap();
function _convertToLowercase(val) {
    return val.toLowerCase();
}
class Person {
  constructor(name) {
    privateProps.set(this, {name: name});
  }
  getName() {
    return _convertToLowercase(privateProps.get(this).name);

lushijie

Function.prototype.before = function(beforefn){
	var _self = this;  //保存原函数的引用
	return function() {  //返回包含了原函数和新函数的 ‘代理’函数
		beforefn.apply(this, arguments);  //执行新函数，修正this，新函数在原函数之前执行
		return _self.apply(this, arguments); //执行原函数，并保证this不会被劫持
	}
}

Function.prototype.after = function(afterfn) {
	var _self = this;

lushijie

let articleRequest = () => {
  let f = function() {
    // todo
  }.bind(this)();
  return f;
};
articleRequest();

let articleRequest2 = function f() {
  // todo

lushijie

Function.prototype.bind2 = function(context) {
  const self = this;
  const args = Array.prototype.slice.call(arguments, 1);
  return function() {
    const args2 = Array.prototype.slice.call(arguments);
    self.apply(context, args.concat(args2));
  }
} 

lushijie

;(function() {
    function MyModule() {
      // ...
    }
    var moduleName = MyModule;
    
    if (typeof module !== 'undefined' && typeof exports === 'object' && define.cmd) {
        module.exports = moduleName;
    } else if (typeof define === 'function' && define.amd === 'object' && define.amd) {
        define(function() {

lushijie

function interceptNetworkRequests(ee) {
    const open = XMLHttpRequest.prototype.open;
    const send = XMLHttpRequest.prototype.send;

    const isRegularXHR = open.toString().indexOf('native code') !== -1;


    // don't hijack if already hijacked - this will mess up with frameworks like Angular with zones
    // we work if we load first there which we can.
    if (isRegularXHR) {

lushijie

// determine if in-browser or using node.js

// thruthy
var _nodejs = (
  typeof process !== 'undefined' && process.versions && process.versions.node);
if (_nodejs) {
  _nodejs = {
    version: process.versions.node
  };
}

lushijie

function datetime(date = new Date(), format) {
  if (date && typeof date === 'string') {
    const dateString = date;
    date = new Date(Date.parse(date));
    if (isNaN(date.getTime()) && !format) {
      format = dateString;
      date = new Date();
    }
  }
  format = format || 'YYYY-MM-DD HH:mm:ss';