TRACKING TOOLING DEVELOPER TOOL
Visual Form Event Listener Builder
A visual tool allowing measurement engineers and developers to configure, simulate, and export production-ready form tracking listeners in seconds.
CATEGORY TRACKING TOOLING
STACK & RUNTIME React • TypeScript • Tailwind CSS • DOM Parser Engine
Core Code Architecture:
Generated Form Listener Output Generated Form Listener Output
javascript
// Generated via Visual Form Listener Builder v1.0
window.addEventListener('DOMContentLoaded', function() {
var targetForm = document.querySelector('#contact-sales-form');
if (!targetForm) return;
targetForm.addEventListener('submit', function(e) {
window.dataLayer = window.dataLayer || [];
window.dataLayer.push({
event: 'generate_lead',
form_id: 'contact-sales-form',
form_type: 'b2b_inbound',
lead_category: targetForm.querySelector('[name="company_size"]')?.value || 'unknown',
timestamp: Date.now()
});
});
});
01
Tool Purpose & Motivation
Measurement engineers spend countless hours writing custom DOM event listeners across client websites. Minor differences in class names, form IDs, and submission mechanics lead to inconsistency across containers. The Visual Form Builder provides a GUI to configure tracking rules, validate selectors, and output deterministic JavaScript code that adheres to enterprise tagging standards.
- Visually inspect and select DOM forms without digging into browser DevTools
- Map form inputs to GA4 recommended parameters (e.g. lead_source, form_name)
- Export validated JavaScript snippets ready for direct implementation or GTM injection
02
Application Workflow & Generation Engine
The builder guides users through form selection, trigger condition assignment, parameter mapping, and instantaneous code generation.
Form Input / Selector Input →
Trigger State Selection →
Parameter Schema Mapping →
Real-time JSON & JS Preview →
Copy-Paste Export