The tricky thing, and the thing that stumped us for quite a while, is that the system variables provided by the OnChange function are objects and not strings. So the String newValue is critical or the case statement will fail. When I was done, every value in the array was the same.
Save my name, email, and website in this browser for the next time I comment. Sign me up for the mailing list! Leave this field empty. Previous Next. My friend Peter from Down Under sent me a great tip the other day about an issue he had with an onChange catalog client script.
Hopefully this tip keeps someone from having to bang their head against a wall for a few hours. Thanks Peter! About the Author: Crossfuze Admin.
Related Posts. April 17th, 18 Comments. Client Side Dates in ServiceNow. February 22nd, 5 Comments. April 30th, 3 Comments. September 20th, 9 Comments. Reload a Form or Related list from a Client Script. October 4th, 23 Comments. Peter Oneppo April 17, at pm - Reply. Mark Stanger April 18, at am - Reply. Thanks Peter, I remember this giving me fits when I first came across it. Good tip! Leave A Comment Cancel reply Comment.The Fall Stable 1 release makes a slight tweak to the way you can use getReference that can really improve the end user experience from a performance perspective.
To understand why this new functionality is so important, you must first understand the difference between synchronous and asynchronous processing.
Asynchronous processing, on the other hand, allows for step 2 to start even when step 1 is still in process. These are 2 common out-of-box configurations that most every client ends up using. While the functions work great, they can also be very expensive from a performance perspective in part because they both use synchronous processing to call back to the server and request information.
When this happens, the entire user session has to wait for this processing to complete. Step 2 populating the location and indicating a VIP cannot start until Step 1 querying the server for user information finishes. What this does is allow you to use asynchronous processing with your getReference call. So when your script executes, the system initiates the necessary query Step 1but continues right along with everything else instead of waiting for the result from the getReference call.
Eventually, that call will return with a result though. Today I created the script below. The major benefit to this script is that it combines the 2 scripts and completely eliminates one of the GlideRecord queries to the server.
That alone is a pretty big deal. The second thing this script does is use the new getReference callback function to process the server call asynchronously and keep the form from locking up while your user waits for a result. There are 4 major pieces to the script below that I think are really important…. Save my name, email, and website in this browser for the next time I comment. Sign me up for the mailing list! Leave this field empty. Previous Next.
About the Author: Crossfuze Admin. Related Posts. April 17th, 18 Comments. Client Side Dates in ServiceNow. February 22nd, 5 Comments. April 30th, 3 Comments. September 20th, 9 Comments. Reload a Form or Related list from a Client Script. October 4th, 23 Comments.
Use client scripts to configure forms, form fields, and field values while the user is using the form. Client scripts can: make fields hidden or visible make fields read only or writable make fields optional or mandatory based on the user's role set the value in one field based on the value in other fields modify the options in a choice list based on a user's role display messages based on a value in a field Introduction to client scripts, script types, APIs, and good practices Where client scripts run With the exception of onCellEdit client scripts, client scripts only apply to forms and search pages.
If you create a client script to control field values on a form, you must use one of these other methods to control field values when on a list. Create an access control to restrict who can edit field values. Create a business rule to validate content.
Create a data policy to validate content. Create an onCellEdit client script to validate content. Disable list editing for the table. Field Description Name Name of the client script. Table Table to which the client script applies.
UI Type Target user interface to which the client script applies.
Type onLoad — runs when the system first renders the form and before users can enter data. The onChange client script must specify these parameters. Note: control is not accessible in mobile and service portal. The onCellEdit client script must specify these parameters. If true is passed as a parameter, the other scripts are executed or the change is committed if there are no more scripts. If false is passed as a parameter, any further scripts are not executed and the change is not committed.
Note: onCellEdit client scripts do not apply to dashboard list widgets. Name of the client script. Table to which the client script applies. UI Type.The green field indicators give a simple visual cue to the user. Checking for changes to variables is a bit more complex because the underlying element changes names.
This script will check an individual variable…. It will return a count, so any count greater than 0 means that something on the form has been modified….
Service-now includes some simple convenience methods for identifying changes to a record or field in a business rule. Record change: current. What if you just need to return a list of changed fields or values? This might be one field, or 30 fields! The first part is gathering these changes when you trigger your email notification event. Because the changes need to be captured at the time the record is updated or inserted, this needs to happen in a business rule. The result of this mail script will look something like this….
Thanks for the feedback — as always :. The paragraph in question has been removed. The method I had mentioned was necessary at one point, but is no longer necessary. If somebody can come up with that it would be very helpful :. There are really 2 options for producing that information though. In my opinion, this method would probably be pretty messy to pull off because getting display values for different types of fields can be difficult.
The potential drawback here is that history sets are only available for audited tables. This can also be kind of tricky to make sure you get the correct information. If you want to go the history set route, then you could look at the UI page included in the Simultaneous Update Alert Update Set that I built recently.
Hi Mark — this is working great for me except for one field, the description field has an error when it is changed. Thanks for the feedback. Please let me know if that works better for you. The email fires and includes all the fields that were changed except Urgency and Description.
I was getting an error on the line dealing with the getJournalEntry so I removed that section from the mail script but if I just update the Description on the Incident, the email fires and does not include the change to that field. Any ideas?ServiceNow Catalog Item Creation - ServiceNow Catalog Item Development and Overview
Used the business rule you have above to show the changes to the fields and noticed you used changedValues in that business rule. You can accomplish this with ACLs. Our requirement is to have an alert if the Update button was hit and there are no changes in the form. I used the first script on the other way:. But this still pop ups everytime the user right click and choose on the context menu… Please help. This post shows you how to do that.
You can create a UI script and designate it as global, which makes the script available on any form in the system. You cannot create a global UI script in a scoped application. You can mark a UI script as Global to make it available on any form in the system.
For example, you can create a UI script that has a function helloWorldand has the Global field checked:. After you create this global UI script, you can call the helloWorld function from any client script or UI policy you write. Indicator of whether the script loads on every page in the system. To run a UI script on a form, create a formatter. Add the formatter on the form view. This code ensures that the definitions and results of the UI script are immediately available in the browser. For example, include the UI script named CoolClock with this code:.
UI scripts are not supported for mobile.
Only active UI scripts can run. Global Indicator of whether the script loads on every page in the system. Note: Use caution when creating global UI scripts because they can impact performance. Follow these guidelines when running UI scripts. Note: This class does not support UI scripts with the Global field set to true.The ServiceNow Wiki is no longer being updated.
Typically, you use an onLoad script to perform some client side manipulation of the document on screen. An onLoad script must contain a function named onLoad. Otherwise, it is entirely up to you what your script does after it gets to the client.
For example, here is a trivial onLoad script that displays a message box that says "Loading An onSubmit script runs when a form is submitted. Typically, you use an onSubmit script to validate things on the form and ensure that the submission makes sense. As such, onSubmit scripts can potentially cancel a submission by returning false. For example, here is an onSubmit script that prompts the user to confirm that a priority one ticket should really be submitted.
If the user clicks Cancel in the confirmation dialog box, the submission is canceled. The important thing to remember here is: to stop form submission, return false from your onSubmit script. An onChange script can run when a particular field changes value or when the form is first drawn and no fields have changed value from previous script actions.
As such, onChange scripts can potentially act as onLoad scripts with extra conditions. For example, here is an onChange script that notifies the user whenever the short description field on a form changes. To prevent an onChange script from running when the form loads, add the following condition to the top of the script.
Scripts can be defined as onCellEdit to run on the client side when the list editor interacts with a cell. The client code needs to know which function to attach to the document. Hence, it requires that you follow our naming convention with functions. Note that you can have more than one function on a client side script and have your onSubmit function, for example, call other functions.
The requirement is that the primary function follow our naming convention. You can, but there is no guarantee of sequencing. You cannot predict what order your event handlers will run.
Have your onSubmit function return false. For example the following snippet of code disallows all form submission.
Client-side scripting design and processing
To call a business rule from a client script, use GlideAjax. While you can use client scripting to hide or show a field, you can usually accomplish the same thing without scripting via UI policies. While you can use client scripting to make a field mandatory, you can usually accomplish the same thing without scripting via UI policies.
While you can use client scripting to make a field read-only, you can usually accomplish the same thing without scripting by using UI policies.ServiceNow has effectively prevented its customers from utilizing any form of DOM manipulation in the service portal.
For those who were brave enough to invest heavily in the Service Portal early on, this has caused major issues. Often during conversation with prospective ServiceNow customers, users, and developers, I am asked what it is that I like about the platform.
Don't get me wrong; I'll often say things like "That's not a good idea", or more commonly: "I get what you're driving at, but what if we did it a little more like this Is that dangerous? Sure, it can be.
But should the customer and I be able to decide for ourselves if we want to take the risk? I firmly believe so. That is why the Service Portal appears to be something of a "new direction" for ServiceNow. It brings a boatload of new, beautiful, amazing front-end features, properly implements Angular Not only that, but no alternative has been provided for the functionality that was removed. That means that if you want to enable some basic functionality previously provided by getControlyou're going to have to write a separate custom widget for the one catalog item you want it to run onand it's going to require a lot of custom code.
If you're a developer who's gone through an upgrade in the recent past, and considered moving your Service Catalog into the Service Portal, you already know all about these complaints. You've had them all yourself or at least, your clients have ; so let's get on to the part where we solve them! These scripts load and run as the document loads, before ServiceNow does whatever it does to obfuscate the DOM from being accessible to client scripts.
This is the key. To get started, first create a new UI Script. I named mine setupDOM. This way, it'll only load on the Service Portal and only on portals we want it to. This step alone, means that you can do basic DOM manipulation already, from client scripts; either by using myDocument directly like so:.
Or of course, you can just set the original object names back to your reference to the actual objects which ServiceNow have prevented you from typically accessing through catalog client scripts in the Service Portal by doing something like this:. So that's what those first few lines do, but what about that big function below it? Now that our magical new UI Script is defined, we just have to tell the specific Service Portal we're using, to load it as a JS library.
From there, select your Service Portal from the list. Once on the Theme record, scroll down to the related lists, and select JS Includes.
You may have noticed that the query we passed into client. Hello, future readers!
I just wanted to add that in a recent patch, ServiceNow have actually exposed a lot more access. Here are some usage examples:. So this is all pretty great. First though, we'll need to add a new method that we can call using GlideAjax; the existing method is written specifically for returning a query.