JavaScript Singleton和IntelliJ Idea

Question

I'm having trouble with IntelliJ Idea's code completion and syntax checking and JavaScript.

I have the following (simplified) code for a Singleton object:

var MySingleton = new function() {
    var self = this;

    self.prop = "hello world";

    self.printHello = function() {
        console.log(self.prop);
    };
};

MySingleton.printHello();

The problem is, that IntelliJ complains at the last line about Unresolved function or method printHello() . It also will not suggest printHello when autocompleting from MySingleton. . The code itself works fine though.

I guess I have to either annotate or rewrite my code in a different style. But how?

Answer 1

I am using factory to get Singeltons in Javascript.

var factory = function(){
    this.singelton = null;
    /**
     * @return MySingleton
     */
    function singelton(){
        if(this.singelton==null){
            this.singelton = new MySingelton();
        }
        return this.singleton;
    }
}

var instance_of_my_singleton = factory.singelton();

Answer 2

It seems like the module pattern is close to what I want to do and is well supported by Idea's code indexing:

var MySingleton = (function () {
    var self = this;

    var prop = "hello world";

    function printHello () {
        console.log(self.prop);
    };

    // export public functions
    return {
        printHello: printHello
    };
})();

MySingleton.printHello();