JavaScript中调用函数的4种方式代码实例

var myObj = {//对象字面量  param1: 1,  param2: 2,  sum: function (){//this关键字只带当前的对象return this.result = this.param1 + this.param2;  }}myObj.sum(); //=>3

var add = function(a, b){  return a + b;}//函数调用模式add(1,2); //=>3

function add(a, b){  return a + b;}add(1,2);//=>3

var add = function() {  this.name = "汇智网";  this.sum = function (a, b){    return a + b;  }}// 构造器调用模式var obj = new add(); //obj是一个对象obj.sum(1,2); //=>3

var add = function (a, b) {  return a + b;} add.apply(null,[1,2]); //=>3

var add = function (a, b) {  return a + b;}add.call(null,1,2); //=>3