Corp/docs/guides/LIVE_VALIDATION_GUIDE.md

Legacy form live validation

backend/static/js/components/liveValidationHandler.js provides client-side validation for server-rendered Django forms. It is not used as the authorization or data-integrity boundary; Django forms and DRF serializers must repeat every required validation rule.

import { initLiveValidation } from './liveValidationHandler.js';

const validation = initLiveValidation({
  formSelector: '#registrationForm',
  debounce: 500,
  rules: {
    email: [
      { type: 'required', message: 'Email обязателен' },
      { type: 'email', message: 'Некорректный email' }
    ]
  }
});

Supported rule types are required, email, pattern, minLength, maxLength, match, anyContact and a custom validate function. Options control validation on input, blur and submit.

The returned object exposes validateField, validateForm, clearValidation and destroy. Call destroy when replacing a form dynamically to avoid duplicate listeners.

The module applies Bootstrap is-valid, is-invalid and invalid-feedback classes. New Next.js forms should use their component-level validation and API errors instead of importing this legacy browser module.