本文实例讲述了JavaScript获得指定对象大小的方法。分享给大家供大家参考。具体如下：

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1 2 3 4 5 6 7 8 9 10 11 function objectSize(the_object) { /* function to validate the existence of each key in the object to get the number of valid keys. */ var object_size = 0; for (key in the_object){ if (the_object.hasOwnProperty(key)) { object_size++; } } return object_size; }

用法如下：

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1 2 3 4 5 6 7 // Arbitrary object var something = { dog: cat, cat: dog } console.log(objectSize(something)); // Logs: 2

希望本文所述对大家的javascript程序设计有所帮助。