JavaScript object-oriented private static variable instance analysis_javascript skills

This article analyzes object-oriented private static variables in JavaScript with examples. Share it with everyone for your reference, the details are as follows:

As we all know, the principle of private instance variables is based on scope.

Private instance variables are implemented using the var keyword inside a Javascript function and are only valid inside the function.

Imitate this and propose a solution of private static variables:

<script language="javascript" type="text/javascript">
var JSClass = (function() {
 var privateStaticVariable = "私有静态变量";
 var privateStaticMethod = function() {
  alert("调用私有静态方法");
 };
 return function() {
  this.test1 = function() {
   return privateStaticVariable;
  }
  this.test2 = function(obj) {
   privateStaticVariable = obj;
  }
  this.test3 = function() {
   privateStaticMethod();
  }
 };
})();
var testObject1 = new JSClass();
var testObject2 = new JSClass();
alert(testObject1.test1());
testObject1.test2("改变的私有静态变量");
alert(testObject2.test1());
testObject2.test3();
</script>

Note that instead of defining the Javascript class directly, an anonymous function is used as a container for static variables and returns the Javascript class .

Readers who are interested in more content related to object-oriented JavaScript can check out the special topic of this website : "Javascript Object-oriented Introductory Tutorial"

I hope this article will be helpful to everyone in JavaScript programming.