Project Online / Project Server: Project Detail Pages - Enhancements (Part 4) - Show/Hide a field based on the value of an Enterprise Custom Field without Lookup Table using REST

<!-- Change path for jquery-2.1.1.min.js --> <script type = "text/javascript" src = "/sites/pwa/Scripts/jquery-2.1.1.min.js"></script><script type = "text/javascript">// This script will hide a Enterprise Custom Field on a Project Detail Page if an internal field not displayed on the page is empty or 0// Change FieldToCheckGUID to internal field name to be checked. Replace "Cost" by field to be used. Using an object for future purposesvar FieldToCheckGUID = "90c7672c-a519-e911-afbd-00155d80531a";// Change To Enterprise Custom Field name to be hiddenvar FieldToHide = "CostCenter";// Use appropriate variable RESTAppendix//var RESTAppendix = "/Draft/IncludeCustomFields" //Draft data as available after save only - not working in Project Online on 2019-01-29var RESTAppendix = "/IncludeCustomFields"//Without "Draft", last published information will be evaluated//Transform Guid to property in REST
FieldToCheckGUID = "Custom_x005f_" + FieldToCheckGUID.replace(/-/g, "");var FieldToCheck = {};
FieldToCheck[FieldToCheckGUID] = undefined;//A global variable is necessaryvar Delegate; // Online necessary in on premise environments//Call main function
$(document).ready(ExecuteOrDelayUntilScriptLoaded(MainFunction, "sp.js"));//MainFunction function MainFunction() {//Use this part only with On Premise - begin  if (WPSC.WebPartPage.WebURL.indexOf("sharepoint.com") == 0) {
        CheckDelegate();if (Delegate == true) {
            console.log("Delegate session active - REST not working on premise");return;
        }
    }//Use this part only with On Premise - end//function to retrieve Project information
    GetProjectProperties(PDP_projUid, FieldToCheck, RESTAppendix);//GetProjectProperties is written to return more than one information. To call function FieldToCheck we need only one field with ist valuevar FieldToCheckValue = {};
    FieldToCheckValue.name = Object.keys(FieldToCheck)[0];
    FieldToCheckValue.value = FieldToCheck[Object.keys(FieldToCheck)[0]];
    CheckFieldValue(FieldToCheckValue);
}function CheckDelegate() {var data = $.ajax({// we need the result, therefore "async: false"
        async: false,
        url: _spPageContextInfo.siteAbsoluteUrl + "/_api/Projectserver()?$SELECT=IsDelegate",
        type: "GET",
        dataType: "json",
        headers: {
            Accept: "application/json;odata=verbose"
        }
    });

    data.done(function(data) {if (data.d.results == undefined) {
            Delegate = data.d.IsDelegate;
        }
    });
}//Get ProjectProperties: FieldsToLock,function GetProjectProperties(ProjectUID, InternalFields, REST) {var data = $.ajax({
        async: false,
        url: _spPageContextInfo.siteAbsoluteUrl + "/_api/ProjectServer/Projects(guid'" + ProjectUID + "')" + REST,
        type: "GET",
        dataType: "json",
        headers: {
            Accept: "application/json;odata=verbose"
        }
    });
    data.done(function(data) {if (data.d.results == undefined) {//This script is written to be re-used for future purposes. To get a specific value directly, the following lines can be replaced by e.g.//  InternalFields["Cost"] = data.d.Cost  //remove "//" at begin of this line to enable simple approach//  /*                                    //remove "//" at begin of this line to enable simple approach
            ResultData = data.d;for (var pfProperty in InternalFields) {for (var key in ResultData) {if (key == pfProperty && key == pfProperty) {
                        console.log('property: ' + key + 'value: ' + ResultData[key]);
                        InternalFields[pfProperty] = ResultData[key];
                    }
                }
            }//  */                                    //remove "//" at begin of this line to enable simple approach
        }
    });
}//This function will evaluate the field value to define visibility requirementfunction CheckFieldValue(field) {if (field != null&& field.value != ""&& field.value != 0 && field.value != undefined) {
        setFieldVisibility(FieldToHide, true);
    } else {
        setFieldVisibility(FieldToHide, false);
    }
}//Show/Hide a fieldfunction setFieldVisibility(field, bool) {
    $(".ms-accentText").each(function(index) {if ($(this).text() == field) {
            $(this).closest('tr').toggle(bool);
        }
    });
}</script>