Lattice

Lattice noun
A structure consisting of strips of wood or metal crossed and fastened together

Lattice is a powerful, flexible email editor component. Originally a fork of easy-email-editor, Lattice has been modernized to be fully compatible across all browsers and provides first-class support for React 19. Lattice uses MJML under the hood which is a markup language designed to represent email templates.

Demo

Development

$ git clone git@github.com:ZachGagnon1/Lattice.git

$ pnpm install
$ pnpm run install-all
$ pnpm run dev

If you need some new features, we always welcome you to submit a PR.

Usage: LatticeEditor

The core component of this library is the LatticeEditor. Below is a basic example of how to integrate it into your React 19 application.

import React, { useState } from "react";
import { LatticeEditor, IEmailTemplate } from "lattice"; // Replace with actual import path

const initialTemplate: IEmailTemplate = {
  // Add your default template JSON structure here
};

export default function App() {
  const [emailData, setEmailData] = useState<IEmailTemplate>(initialTemplate);

  // Handle image uploads inside the editor
  const handleUploadImage = async (file: Blob) => {
    // Implement your server upload logic here
    // return the hosted image URL
    return "[https://example.com/uploaded-image.png](https://example.com/uploaded-image.png)";
  };

  return (
    <div style={{ height: "100vh" }}>
      <LatticeEditor
        data={emailData}
        onChange={(values) => setEmailData(values)}
        onUploadImage={handleUploadImage}
        height="calc(100vh - 108px)"
        config={{
          showSourceCode: true,
          showBlockLayer: true,
          compact: false,
          dashed: true,
        }}
      />
    </div>
  );
}

Interesting Configurations (LatticeEditorConfig)

The LatticeEditor component accepts a config object that gives you fine-grained control over the editor's layout and tools.

• showSourceCode (boolean): Toggles the visibility of the source code panel. Defaults to false.

• showBlockLayer (boolean): Determines whether the block layer panel is shown. Defaults to true.

• mjmlReadOnly (boolean): If set to true, the MJML code output panel will be read-only. Defaults to false.

• dashed (boolean): Toggles a dashed border outline on the canvas, making it easier to visualize structural layout constraints. Defaults to false.

• compact (boolean): Renders the editor panels in a tighter, compact view. Defaults to true.

Additional Noteworthy Props

• onChange: Features a built-in 200ms debounce to prevent excessive re-renders while the user is actively making changes.

• onUploadImage: If you do not provide an onUploadImage prop, Lattice will automatically strip out all "Image" blocks (Basic and Advanced) from the available components list so users don't try to use blocks they can't upload files to.

Additional Notes

• If you want the same customizability as easy-email-editor most of the features should be available but since there is no more multi package layout you will need to change your imports to lattice
• The Editor uses MUI components under the hood. This means that the style is fully customizable with MUI's theming capabilities. (Some things still use legacy css and also have built in styles)
• It is possible to convert Unlayer templates using the unlayerToLattice function, it is quite basic but should cover a lot of the common cases.

License

The MIT License