Skip to main content

Documentation Index

Fetch the complete documentation index at: https://docs.landerlab.io/llms.txt

Use this file to discover all available pages before exploring further.

Learn how to extend your Landerlab funnel with custom JavaScript for more advanced use cases. Landerlab allows you to build funnels without coding, but you can add custom JavaScript when you need more control over behavior, logic, or integrations.
Group 84

​
How it works

When your quiz loads, Landerlab initializes the funnel and makes its functionality available through events. You can listen to these events and run your own JavaScript when something happens in the funnel, such as when the quiz starts, a step is viewed, or the quiz is submitted.

​
Use the APIs

Landerlab provides two main APIs for customization:
  • Quiz API – used to interact with the quiz (get/set values, navigate steps, access blocks)
  • Events API – used to listen for actions happening in the funnel (init, step view, submit, clicks)
You can combine both to build custom functionality.

​
Access the Quiz API

The Quiz API is available inside events. 
window.addEventListener('ll-quiz-init', (event) => {
  const llQuizApi = event.detail.llQuizApi;

  // your code here
});

​
Example: run code when the quiz loads

window.addEventListener('ll-quiz-init', (event) => {
  const { quizId } = event.detail;

  console.log('Quiz loaded:', quizId);
});

​
Example: update a field value

window.addEventListener('ll-quiz-init', (event) => {
  const { llQuizApi } = event.detail;

  const block = llQuizApi.getBlockByName('email');

  if (block) {
    block.setValue('[email protected]');
  }
});

​
Example: navigate between steps

window.addEventListener('ll-quiz-button-click', async (event) => {
  const { llQuizApi, blockName } = event.detail;

  if (blockName === 'next-btn') {
    await llQuizApi.navigation.goToStep('step-2');
  }
});

​
Example: listen for submission

window.addEventListener('ll-quiz-submit', (event) => {
  const { fieldsSimple } = event.detail;

  console.log('Submitted data:', fieldsSimple);
});

​
Available events

You can listen to different events such as:
  • ll-quiz-init
  • ll-quiz-step-view
  • ll-quiz-step-leave
  • ll-quiz-button-click
  • ll-quiz-input-click
  • ll-quiz-submit

​
When to use custom JavaScript

Use custom JavaScript when you need:
  • custom logic or conditions
  • integrations with external tools
  • advanced tracking
  • dynamic field updates
  • custom navigation\