JavaScript中两种链式调用实现代码_javascript技巧

function ClassA(){
this.prop1 = null;
this.prop2 = null;
this.prop3 = null;
}
ClassA.prototype = {
method1 : function(p1){
this.prop1 = p1;
return this;
},
method2 : function(p2){
this.prop2 = p2;
return this;
},
method3 : function(p3){
this.prop3 = p3;
return this;
}
}

var obj = new ClassA();
obj.method1(1).method2(2).method(3); // obj -> prop1=1,prop2=2,prop3=3

/**
* chain 精简版
* @param {Object} obj
*/
function chain(obj){
return function(){
var Self = arguments.callee; Self.obj = obj;
if(arguments.length==0){
return Self.obj;
}
Self.obj[arguments[0]].apply(Self.obj,[].slice.call(arguments,1));
return Self;
}
}

//定义的function/类ClassB
function ClassB(){
this.prop1 = null;
this.prop2 = null;
this.prop3 = null;
}
ClassB.prototype = {
method1 : function(p1){
this.prop1 = p1;
},
method2 : function(p2){
this.prop2 = p2;
},
method3 : function(p3){
this.prop3 = p3;
}
}

var obj = new ClassB();
chain(obj)('method1',4)('method2',5)('method3',6); // obj -> prop1=4,prop2=5,prop3=6

// result -> prop1=4,prop2=5,prop3=6
var result = chain(obj)('method1',4)('method2',5)('method3',6)();

obj
.method1(arg1)
.method2(arg2)
.method3(arg3)
...

chain(obj)
(method1,arg1)
(method2,arg2)
(method3,arg3)
...