如何在JavaScript中识别对象的方法和属性

Question

如何在javascript中识别对象的方法和属性？每个对象有多少方法和事件？

Answer 1

If you using Google browser make use of the console window. Enter the valid object and you may find a drop-down button which enlists all the methods and its respective properties registered to it.

Answer 2

You can easily know what are Object keys and then you can also get their perticular value

Object.keys(yourObj)

if you know the property and want to check whether it exists in your object or not then

youObj.hasOwnProperty("propName")