Dynamic Form Fields: Update WordPress Fields Based on Other Values | JetFormBuilder

Learn how to make JetFormBuilder form fields update dynamically based on what users select or enter — using calculated values, Option Pages, custom queries, and JetEngine relations. This video covers 5 practical use cases: from simple dynamic values and math calculations to populating multi-option fields from a query and loading related items based on another field's selection. ✅ What you'll learn: • Add dynamic values to form fields automatically • Use the Calculated field for real-time math in forms • Pull values from JetEngine Option Pages into calculations • Populate Multi-Option fields from a custom query • Load related items dynamically based on another field's value ⚠️ Note: Since the April 2026 JetFormBuilder release, you no longer need to rely on complex macros to output dynamic values – most use cases in this video can now be handled directly via the Select data source in the field settings. The number of dynamic generators has also expanded, making it easier to pull related data into your forms. ❓ Do I still need macros for dynamic values after the 2026 update? In most cases, no: you can now use the Select data source and built-in generators to load dynamic data into fields without writing complex formulas; macros are only needed for very custom logic. ❓ Do I need JetEngine for these dynamic form setups? You can use basic dynamic values and calculations with JetFormBuilder alone, but JetEngine is required for Option Pages, custom queries, and relations-based lookups. ❓ Can I use these techniques in multi-step or conditional forms? Yes, dynamic values, calculated fields, and query-based options can be combined with multi-step layouts and conditional logic as long as the field dependencies are configured correctly. ------------- ► TIMESTAMPS 00:00 Introduction 00:40 Simple use cases: adding dynamic values 01:53 A Calculated field 02:35 Using Option Page values in calculations 03:24 Getting data dynamically for Multi-Optional fields 05:59 Getting values list from a custom query 08:54 Getting related items of existing form fields ------------- ► Get JetFormBuilder: https://out.crocoblock.com/4dsONRj ► Get JetEngine: https://out.crocoblock.com/3zDS8PC ► Choose Crocoblock subscription: https://out.crocoblock.com/4dw4Bm9 🔧 Free Addon — Update Field Based on Other Field's Values: 👉 https://github.com/ihslimn/jet-form-b... 📄 Updating JetFormBuilder fields based on other fields' values: use cases: 👉 https://out.crocoblock.com/4eDKPX1 📄 Calculated Field overview: 👉 https://out.crocoblock.com/3XNAIIi 📄 Advanced math calculations: 👉 https://out.crocoblock.com/4gKAmuB 📄 Option Pages overview and use cases: 👉 https://out.crocoblock.com/3Bx27Xq 📄 Query Builder overview: 👉 https://out.crocoblock.com/4dl2VMs ------------- ► Related videos: ◎ JetFormBuilder | Tutorials playlist 👉    • JetFormBuilder | Tutorials   ◎ How to Combine WordPress Calculated Fields | JetFormBuilder 👉    • How to Combine WordPress Calculated Fields...   ◎ JetFormBuilder dynamic generators & Select data source (2026 update) 👉    • Dynamic Form Fields: Update WordPress Fiel...   ------------- Have questions about dynamic field updates in JetFormBuilder? Drop them in the comments. If this helped, like the video and subscribe for more WordPress tutorials: 👉    / @crocoblock   #JetFormBuilder #JetEngine #WordPress #DynamicForms #Crocoblock ------------- ► Join us here: ► FB Community:   / crocoblockcommunity   ► Discord Community:   / discord   ► Facebook:   / crocoblock   ► Twitter:   / mrcrocoblock   ► Instagram:   / mrcrocoblock   ► LinkedIn:   / crocoblock