The Challenge of Visual Website Builders

Visual website builders appear deceptively simple. Users drag, drop, edit text, upload images, and click save, expecting a polished website to materialize. However, the underlying reality is significantly more complex. A website builder is not merely a frontend editor; it’s a comprehensive system tasked with storing intricate layouts, managing a library of reusable components, ensuring responsive behavior across devices, supporting diverse business needs, and reliably rendering thousands of potential design combinations. For Webruno, architecting a flexible and robust page builder was a paramount engineering challenge.

Why Storing Raw HTML Fails

The most straightforward, yet ultimately problematic, approach to storing a website’s structure would be to save the generated HTML directly. Consider this simple example:

<section>
  <h1>Build your business online</h1>
  <button>Start Now</button>
</section>

While this captures the visual output, it introduces several critical limitations:

  • Editing Becomes Difficult: Modifying specific elements within raw HTML requires direct code manipulation, which is cumbersome for non-technical users and inefficient even for developers.
  • Component Reusability is Lost: Each piece of HTML is treated as unique. There’s no inherent mechanism to recognize a button or a card component and reuse its styling or functionality across different parts of the website or in future projects.
  • State Management is Impossible: Visual editors often involve dynamic elements, interactive states (like hover effects), or user-specific configurations. Raw HTML offers no structured way to manage or persist these states.
  • Responsiveness is Hardcoded: Implementing responsive design typically involves CSS media queries. Embedding these directly into raw HTML makes it difficult to manage and adapt layouts for different screen sizes dynamically.
  • Data Binding is Unwieldy: If components need to display dynamic data, integrating data binding into raw HTML strings becomes an error-prone and unmanageable task.

To overcome these hurdles, Webruno adopted a component-based architecture, treating the page as a tree of structured data rather than a string of HTML.

Webruno’s Component-Based Architecture

The core of Webruno’s page builder relies on a structured data representation of the page. Instead of saving raw HTML, the editor stores a JSON object that describes the page’s structure, components, and their properties. This approach treats the page like a React component tree, where each element is an instance of a specific component with its own set of props.

A typical component might be represented as:

{
  "id": "unique-component-id",
  "type": "Section",
  "props": {
    "backgroundColor": "#FFFFFF",
    "padding": "20px"
  },
  "children": [
    {
      "id": "another-unique-id",
      "type": "Heading",
      "props": {
        "level": "1",
        "text": "Welcome to Webruno!",
        "textColor": "#333333"
      }
    },
    {
      "id": "button-id",
      "type": "Button",
      "props": {
        "text": "Get Started",
        "variant": "primary",
        "onClick": "handleSignup"
      }
    }
  ]
}

This JSON structure offers several advantages:

  • Declarative Editing: The editor manipulates this JSON structure. When a user drags a component, it’s an operation on the data tree. When they change text, a prop in the JSON is updated. This makes editing predictable and robust.
  • Component Reusability: The `"type": "Button"` field clearly identifies the component. The system can then instantiate the actual React button component on the frontend, leveraging its pre-defined logic and styling. This allows for a library of reusable UI elements.
  • State Management and Props: Each component instance has its own `props` object within the JSON. This is where all configuration, dynamic data, and even event handlers can be stored and managed. The editor can easily update these props.
  • Dynamic Rendering: The frontend application reads this JSON and dynamically renders the corresponding React components. This process is highly efficient and allows for complex UIs to be constructed from simple data.
  • Responsiveness and Theming: Responsive adjustments can be managed as props or through a theme layer applied during rendering. For example, a `padding` prop could be an object with values for different breakpoints.

The Rendering Engine

The magic happens in the rendering engine, which takes the structured JSON data and translates it into a visible, interactive webpage. This engine needs to be intelligent enough to map JSON types to actual React components, pass the correct props, and handle nested structures.

The process typically involves:

  1. Fetching the JSON data representing the page layout.
  2. Iterating through the JSON tree.
  3. For each node, identifying the corresponding React component based on the `"type"` field.
  4. Rendering that component with the `"props"` provided in the JSON.
  5. Recursively rendering any `"children"` within the current node.

This recursive rendering process is akin to how React itself builds the DOM. The key difference is that the source of truth is not JSX written by a developer, but the JSON data controlled by the visual editor and the user.

This architecture allows Webruno to offer a powerful editing experience. Users can manipulate components visually, and the system translates these actions into structured data changes. When the page is saved and published, this structured data is used by the rendering engine to construct the final, live website.

Future Considerations

While this component-based approach solves many problems, it opens new avenues for development. Managing a large library of components, optimizing the JSON parsing and rendering process for performance, and ensuring seamless integration of third-party components are ongoing challenges. Furthermore, implementing advanced features like A/B testing, real-time collaboration, or complex animations requires careful extension of this core data structure and rendering logic.