itemManager Methods and documentation request.

I cannot sem to find the documentation that actually list the methods inside the itemManager API, I have run a report out of the API but I am still not able to complete the task i am after.

I need to read the "Value" of data source assigned to "item2" in my Custom Widget. Since "setValue" allows me to write a value (1 or 0) to a connection through "Item" I assumed "getValue" value would read teh connection on "Item2" but I countine to get errors in the debug that it is not a function. I have tried the following and recieved either the same error or i just get nothing.

.getValue

.data.

.getItemvalue

.Values

.valueOf

My project in it's current state is attached if that helps, maybe i am using the wrong syntax? I am trying to assign a tag in WebIQ interface and then use the value of that tag (1 or 0) to set the "state" of my button with differnt svg. files. I know I will need to subscribe to the data in a finale iteration but I just wanted to get it functional first.

"The issue is that internal to the js code, there is no way to access the .value of an item and read that as an integer."
Sure there is - there are two ways available:
1. When you only need a one-shot read: readDirect
2. When you want to react to continuous item changes: subscribeItem

Here is the corresponding code from the scripting demo ("demo-item-subscribe") that illustrates this:

        // Define our item names to use - it's best to put them here and not somewhere in the code below
        // for easier changeability and understanding
        const observedItemName = 'ls-observed-item';

        // See below
        let subscriptionToken = null;

        // Get a reference to the ItemManager
        const im = shmi.requires("visuals.session.ItemManager");

        // Create a new instance of an item handler to use and define a function that will be called
        // asynchronously by the framework whenever the item value changes (or is received initially)
        const myItemHandler = im.getItemHandler();
        myItemHandler.setValue = function (value) {
            console.log("[LS demo-item-subscribe] The value of the item has been set to " + value);
        };

        // Obtain a subscription token. You ALWAYS have to store this token and call the appropriate unlisten function
        // when you no longer need it, in this case when the LocalScript will be disabled (see below)
        // If you do not do that this will likely cause memory leaks (https://blog.logrocket.com/escape-memory-leaks-javascript/)
        // leading to more and more RAM used in your HMI until the amount of free RAM will be exhausted and the browser will crash
        // The WebIQ Visuals framework always calls the onDisable function automatically when your LocalScript should not be running anymore,
        // e.g. when it has been included in a screen view and the user switches to another screen.
        subscriptionToken = im.subscribeItem(observedItemName, myItemHandler);

        /* called when this local-script is disabled */
        self.onDisable = function () {
            if (subscriptionToken) {
                subscriptionToken.unlisten(); // Remove the listener and tell WebIQ Server to stop sending us item updates
            }
            self.run = false; /* from original .onDisable function of LocalScript control */
        };

And if your item does not have the type integer in your PLC you can of course cast it with JavaScripts parseInt() method into an integer value.