How Client Scripts Get Server Data in ServiceNow | GlideAjax & g_scratchpad

🚀 SERVICE NOW CLIENT SCRIPTS — PART 2 | g_scratchpad & GlideAjax In Part 1, we learned the four types of ServiceNow Client Scripts — onLoad, onChange, onSubmit and onCellEdit. But there's an important question: 👉 What happens when your Client Script needs information from the ServiceNow server? That's exactly what we're going to solve in Part 2. In this video, we'll learn g_scratchpad and GlideAjax with practical, real-world ServiceNow examples and understand the difference between server-to-client communication and client-to-server-to-client communication. 🔥 WHAT YOU'LL LEARN ✅ What is g_scratchpad in ServiceNow? ✅ What is GlideAjax in ServiceNow? ✅ Client-side vs Server-side scripting ✅ How Client Scripts communicate with the server ✅ Display Business Rules and g_scratchpad ✅ Script Includes and GlideAjax ✅ Client Callable Script Includes ✅ sysparm_name ✅ Passing parameters using addParam() ✅ getXMLAnswer() ✅ Asynchronous GlideAjax ✅ Returning data from a Script Include ✅ Working with JSON responses ✅ JSON.stringify() and JSON.parse() ✅ Reference fields and sys_ids ✅ GlideAjax best practices ✅ When to use g_scratchpad vs GlideAjax 💻 LIVE DEMONSTRATIONS 🔹 Demo 1 — g_scratchpad Current User → Department We'll use a Display Business Rule to prepare server-side information and make it available to an onLoad Client Script. 🔹 Demo 2 — g_scratchpad Incident Caller → Manager We'll retrieve Caller information on form load using g_scratchpad. 🔹 Demo 3 — GlideAjax Incident Caller → Department When the Caller changes, we'll dynamically retrieve the Caller's Department from the server using: Client Script → GlideAjax → Script Include → sys_user → Response 🔹 Demo 4 — Developer-Level GlideAjax Caller → Manager + Department + VIP Status Instead of making multiple server calls, we'll return multiple pieces of information through one GlideAjax request using JSON. 🧠 g_scratchpad vs GlideAjax One of the most important concepts in this video: g_scratchpad Server → Client Use it when you know the information is required when the form loads. GlideAjax Client → Server → Client Use it when the Client Script needs to dynamically request information from the server. You'll learn exactly when to use each approach instead of simply memorizing the syntax. 🔥 IMPORTANT GLIDEAJAX CONCEPTS We'll break down the GlideAjax process step-by-step: Client Script ↓ GlideAjax ↓ Script Include ↓ Server / Database ↓ Response ↓ Client Script ↓ Update Form You'll also learn why asynchronous GlideAjax should generally be preferred and why unnecessary server calls can negatively affect the user experience. 👨‍💻 FOR SERVICE NOW DEVELOPERS This video is especially useful if you're: ✔ Learning ServiceNow Development ✔ Preparing for ServiceNow Developer interviews ✔ Working with Client Scripts ✔ Learning GlideAjax ✔ Learning Script Includes ✔ Moving from ServiceNow Administration to Development ✔ Working with Incident, Problem and Change forms ✔ Preparing for real-world ServiceNow development projects 📚 PART 1 → PART 2 Part 1 ServiceNow Client Scripts We covered: onLoad onChange onSubmit onCellEdit Catalog Client Scripts Real-world Incident, Problem and Change use cases Part 2 g_scratchpad & GlideAjax We now take Client Scripts to the next level by learning how to retrieve server-side information. Coming Next 🚀 Part 3 — UI Policy vs Client Script We'll take real-world requirements and answer one of the most important questions for a ServiceNow Developer: "Should I use a UI Policy or a Client Script?" 🎯 KEY TOPICS COVERED ServiceNow Client Scripts | ServiceNow GlideAjax | GlideAjax Tutorial | g_scratchpad ServiceNow | ServiceNow Script Include | Client Callable Script Include | ServiceNow onChange Client Script | ServiceNow Client to Server | ServiceNow Server to Client | ServiceNow JavaScript | ServiceNow Development | ServiceNow Developer Tutorial | ServiceNow ITSM 🚀 LEARN • BUILD • GROW If you're building your career as a ServiceNow Developer, subscribe to ServiceNow with Kalyan for practical ServiceNow development tutorials, real-world use cases, scripting, ITSM and developer-focused content. 👍 Like the video if it helped you. 💬 Comment your ServiceNow questions below. 🔔 Subscribe for the next part of the series. #ServiceNow #ServiceNowDeveloper #GlideAjax #g_scratchpad #ServiceNowClientScripts #ServiceNowTutorial #ServiceNowDevelopment #ScriptInclude #ServiceNowScripting #ITSM