Access a function outside of a literal object

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Several MyObjList objects can be created by the user. If the load_stream function becomes a member function of MyobjList, multiple getJSON functions are executed, which I don't want.
I want to define the load_Stream function externally so that it only runs once at a time.
The goal is to stop getJSON in progress when a new load stream is requested and start a new request.
When the following code is executed, an error occurs in the get_myValue function of MyObjList as shown below.
how can i solve this problem?

What I have tried:

var myList; /* return value from load_stream function. I know it's no good about this is global variation. This is an just example*/

var load_stream = function( args ){
    $.getJSON("http://..."), args, function( result ){
       myList = result.myReturnValue;       
       return myList
    }).fail(function( jqXHR, error ){
       console.log(',,,');
    })
    return false;
};

var Mediator = function(){
   let MyObj = [],
       length = '0';       
   return {
      addObj: function(){
         var newMyObj = object.create(MyObjList());
         MyObj.push(newMyObj);
         length = MyObj.length;
         MyObj[length].get_myValue():
      }
   }
}

var MyObjList = function(){
   var id,
       page,
       publish;
    return {
        get_myValue: function(){
             const jsonData = {'pID': id, 'cID': publish};
             /* Uncaught RefferenceError: load_stream is not defined */
             page = load_stream(jsonData);
        }        
    }
}

Posted 3-Dec-22 14:31pm

Chopin2001

Updated 4-Dec-22 22:57pm

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Richard Deeming · Accepted Answer · 2022-12-04T22:57:00

It's not entirely clear what you're trying to do here.

If you want to abort one AJAX request when another one starts, you'll want to use an AbortController:
AbortController - Web APIs | MDN[^]

That means you'll probably want to switch to the fetch API:
Fetch API - Web APIs | MDN[^]

To simplify the code, you'll probably also want to use an async function:
async function - JavaScript | MDN[^]

JavaScript

let abortController = null;

const load_stream = async (data) => {
    if (abortController) { abortController.abort(); }
    
    const url = new URL("https://...");
    if (data) {
        Object.entries(data).forEach(entry => {
            const [key, value] = entry;
            url.searchParams.set(key, value);
        });
    }
    
    abortController = new AbortController();
    try {
        const response = await fetch(url, { signal: abortController.signal });
        if (!response.ok) {
            console.error(response.status, response.statusText);
            return [];
        }
        
        const result = await response.json();
        return result.myReturnValue;
    } catch (e) {
        console.error(e);
        return [];
    }
};

const MyObjList = function(){
   let id,
       page,
       publish;
    
    return {
        get_myValue: async function() {
             const jsonData = { 'pID': id, 'cID': publish };
             page = await load_stream(jsonData);
        }        
    }
};

const Mediator = function(){
   let MyObj = [];
   return {
      addObj: async function(){
         const newMyObj = object.create(MyObjList());
         MyObj.push(newMyObj);
         await newMyObj.get_myValue():
      }
   }
};