js object-oriented static method and static attribute instance analysis_javascript skills

The examples in this article describe the static methods and static properties of js object-oriented. Share it with everyone for your reference. The specific analysis is as follows:

Look at the following code first:

Copy code The code is as follows:

Thinking: Can we use Bird's methods and properties without creating a maque object?

Supplementary knowledge points:

(1) What is a function: A function is a variable, and a function is also an object. The essence of the function is actually this:
var sum = new Function('x','y','return x y');//x and y are the parameters of the function, and "return x y" is the function body.

(2) In js, objects, functions and arrays are all created by constructors. So, they are all objects. Since it is an object, the function must have properties and methods.

Copy code The code is as follows:

I hope this article will be helpful to everyone’s JavaScript programming design.