I’ve been trying to build a scraping automation for a platform that renders everything in JavaScript. The site loads with a skeleton, then populates data dynamically. I started with the visual builder in Latenode, dragging and dropping my steps, and it felt smooth until I hit the JavaScript-heavy content rendering.
The visual builder’s browser automation steps are good for straightforward navigation, but this site requires waiting for specific elements to load, then extracting data from dynamically rendered components. I can set up the basic flow visually, but I’m wondering if I need to drop into custom JavaScript to:
Detect when JavaScript has finished rendering
Handle race conditions between my extraction steps
Deal with elements that don’t exist until after JS execution
I know the builder supports JavaScript snippets for power users. But I’m trying to understand: is this just one step beyond no-code, or am I about to unlock a completely different level of complexity?
Has anyone tackled JavaScript-heavy sites while mostly staying in the visual builder? Or does handling dynamic content pretty much force you to write custom code?
You’re asking the right question. Here’s the practical answer: the visual builder handles maybe 70-80% of what you need. JavaScript-heavy sites do require some custom code, but not as much as you might think.
Latenode’s approach is smart here. You build your core workflow visually—navigation, data routing, API calls. Then you inject small JavaScript snippets exactly where you need them. For your use case, that’s probably 2-3 places: one snippet to wait for your target elements, one to handle the extraction, maybe one for error handling.
The key is that you’re not rewriting the whole automation in code. You’re using code surgically, where the visual builder hits its limits. That’s way different from building the whole thing in JavaScript.
I’d recommend this: build what you can visually first. Get to the point where you’re stuck on the JavaScript rendering. Then add a single custom code step. Keep it focused. Most people find that 100-200 lines of JavaScript solves 90% of the dynamic content problem.
The visual builder isn’t getting in your way here—it’s letting you avoid writing the boilerplate so you can focus on the hard part.
JavaScript-heavy sites definitely need some custom handling, but the builder’s design actually supports this well. You don’t have to choose between “pure visual” and “full JavaScript.”
What I’ve found works is building the flow visually, then identifying the exact points where you need custom logic—usually waiting for elements or handling timing. Add those as code blocks. The visual builder then continues with your extraction and downstream steps.
For your specific case with dynamically rendered content, you’re looking at maybe a 10-20 line JavaScript block to wait for your elements. That’s not a major rewrite. It’s targeted intervention.
The no-code builder handles static or server-rendered content well. JavaScript-heavy sites require custom code, but not necessarily much of it. The architecture you’re considering—visual workflow with embedded JavaScript snippets—is actually the right pattern.
For dynamically rendered content, you’ll need custom JavaScript to handle: 1) waiting for rendering completion, 2) extracting data from the rendered DOM. These are typically brief, focused code blocks. The rest of your workflow stays visual.
A hybrid approach is more maintainable than trying to do everything in code or everything in the builder. Most teams find they spend 80-90% of their time in the visual builder and 10-20% in careful custom code for edge cases.