js属性类型之Object.defineProperties()
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> </head> <body> <script type="text/javascript"> //定义多个属性 //Object.defineProperties var book = {} Object.defineProperties(book , { _year: { value: 2004 }, edition:{ value: 1 }, year: { get: function(){ return this._year; }, set: function(newValue){ if(newValue > 2004){ this._year = newValue; this.edition += newValue - 2004; } } } }) </script> </body> </html>