var Klass = function() {}; Klass.extendClass = (function() { var F = function() {}; return function(C, P) { F.prototype = P.prototype; C.prototype = new F(); C.uper = P.prototype; C.prototype.constructor = C; }; })(); Klass.extend = function(props) { var _slice = Array.prototype.slice; var Glass = function() { /*if (Glass.uper && Glass.uper.hasOwnProperty("init")) { Glass.uper.init.apply(this, _slice.call(arguments)) }*/ if (Glass.prototype.hasOwnProperty("init")) { Glass.prototype.init.apply(this, _slice.call(arguments)); } }; Klass.extendClass(Glass, this); Glass.extend = this.extend; for (var key in props) { if (props.hasOwnProperty(key)) { Glass.prototype[key] = props[key]; } } return Glass; };
example:
var A = Klass.extend({ init: function(name) { this.name = name; console.log('A constructor is running!'); }, getName: function() { return this.name; } }); var B = A.extend({ init: function(name) { this.name = name; console.log('B constructor is running!'); }, getName: function() { return this.name; }, a: 'b' }); var C = B.extend({ init: function(name) { console.log('C constructor is running!'); }, c: 'c', getName: function() { var name = C.uper.getName.call(this); return 'Hi, I\'m' + this.name; } }); var c1 = new C('zlf'); console.log(c1.getName());
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