Customising fiori applications by coding

[PRSTG]

So I want to write add a code in existing fiori app called "Manage assignements" wherein a button is to be desabled after reading a input screen and if the input screen matches a particular value. This code is working in the console in inspect tab at runtime. 

What we want to achive is to integrate this javascript code to the fiori app itself by default. Is it possible? What efforts are required?

(function() {
    function disableButtonIfConditionMet() {
        var inputElement = document.getElementById("application-DataSetMatchingAssignment-manage-component---worklist--smartFilterbar-filterItemControl_BASIC-DISP_GROUP-inner");
        var buttonElement = document.getElementById("application-DataSetMatchingAssignment-manage-component---worklist--btnAssign");
 
        if (inputElement && buttonElement) {
            if (inputElement.value === "1520 (Trading Partner balance)") {
                buttonElement.disabled = true;
            } else {
                buttonElement.disabled = false;
            }
        }
    }
 
    // Run the function initially
    disableButtonIfConditionMet();
 
    // Set an interval to run the function every second
    setInterval(disableButtonIfConditionMet, 1000);
})();

@SAPSupport SAP Fiori for SAP S/4HANA SAP Fiori Makers 

[akuller]

search for adaption/extension projects and check whether you really want to integrate the code in this way.