JS creates an object instance in two ways (new operator and object literal)

Read JavaScript Advanced Programming (third Edition) Thoughts:

There are two ways to create an instance of an object, the first with the new operator followed by the object constructor, as follows:

var New Object ();       = "Zoumm";       = "Web Development";

The second is the use of object literal notation, which is intended to simplify the process of creating objects that create a large number of properties. As shown below:

var bb = {name:"Zoumm", Age:

Adding a comma after the last attribute will cause an error in IE7 and earlier China.

When using object literals, the property name can also use a string, as follows:

var bb = {    "name": "Zoumm",    "Age: ' 12,
    "True"}//the numeric attribute name here is automatically replaced with a string

For object literals, it is recommended to only consider the readability of object property names. Object literals are also the preferred way to pass a large number of optional parameters to a function, such as:

  function aa (args) {          if(typeof args.name== "string" ) {                  console.log (args.name);             }           if(typeof args.age== "number" ) {              console.log (args.age);          }      }      AA ({          name:"Zoumm", age          :      ())      AA ({          name:"DJ"      }) 

JS creates an object instance in two ways (new operator and object literal)