这篇文章主要介绍了javascript创建函数的20种方式汇总的相关资料,需要的朋友可以参考下
工作中常常会创建一个函数来解决一些需求问题,以下是个人在工作中总结出来的创建函数20种方式,你知道多少?
? 1 2 3 4 5 6 7 8 function sayHello(){ console.log('hello'); } function leave(){ console.log('goodbye'); } //test sayHello();为完成需求,赶紧声明一个函数吧
? 1 2 3 4 5 6 7 8 9 var sayHello = function(){ console.log('hello'); } var leave = function(){ console.log('goodbye'); } //test leave();有求必应,函数表达数来解决
? 1 2 3 4 5 6 7 8 9 10 11 var Action = { sayHello : function(){ console.log('hello'); }, leave : function(){ console.log('goodbye'); } } //test Action.sayHello();创建一个方法对象类看起来更整洁
? 1 2 3 4 5 6 7 8 9 10 var Action = function(){}; Action.sayHello = function(){ console.log('hello'); } Action.leave = function(){ console.log('goodbye'); } //test Action.sayHello();为单体添加属性方法,净化命名空间
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 var Action = function(){ return { sayHello : function(){ console.log('hello'); }, leave : function(){ console.log('goodbye'); } } } // //test var a = Action(); a.leave();返回新对象我们还有更多的事情可以做
? 1 2 3 4 5 6 7 8 9 10 11 var Action = function(){}; Action.prototype.sayHello = function(){ console.log('hello'); } Action.prototype.leave = function(){ console.log('goodbye'); } //test var a = new Action(); a.sayHello();原型链指向防止创建多次
? 1 2 3 4 5 6 7 8 9 10 11 12 13 var Action = function(){}; Action.prototype = { sayHello : function(){ console.log('hello'); }, leave : function(){ console.log('goodbye'); } } //test var a = new Action(); a.leave();对象赋给原型看上去更整洁
? 1 2 3 4 5 6 7 8 9 10 11 12 var Action = function(){ this.sayHello = function(){ console.log('hello'); } this.leave = function(){ console.log('goodbye'); } } //test var a = new Action(); a.leave();别忘了还可以在类的内部添加属性
? 1 2 3 4 5 6 7 8 9 10 Function.prototype.sayHello = function(){ console.log('hello'); } Function.prototype.leave = function(){ console.log('leave'); } //test var f = function(){}; f.sayHello();基类原型拓展,新的一片空间
? 1 2 3 4 5 6 7 8 9 10 11 12 13 Function.prototype.addMethod = function(name, fn){ this[name] = fn; } var methods = function(){}; methods.addMethod('sayHello', function(){ console.log('hello'); }); methods.addMethod('leave', function(){ console.log('leave'); }); //test methods.sayHello();通用定义方法函数使用更方便
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Function.prototype.addMethod = function(name, fn){ this.prototype[name] = fn; } var Methods = function(){}; Methods.addMethod('sayHello', function(){ console.log('hello'); }); Methods.addMethod('leave', function(){ console.log('leave'); }); //test var a = new Methods(); a.leave();原形赋值我们还可以用类操作
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