Builders provide a way to create complex images using React-like components API. Canvacord under the hood abstracts over satori, an enlightened library to convert HTML and CSS to SVG by providing JSX interface as well as rendering the SVG to other numerous formats like PNG, JPEG, WEBP, etc. This makes it possible to create complex images with little to no configuration.

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Anatomy of a Builder

A builder is a class that extends the Builder class exported by Canvacord. This class contains all the complex logic behind rendering the jsx.

import { JSX, Builder } from "canvacord";

// Options for the builder
interface Props {
  message: string;
}

class MyBuilder extends Builder<Props> {
  public constructor() {
    // The super constructor takes the width and height of the output image
    super(500, 500);
  }

  public setMessage(value: string) {
    // The set method is used to set the value of a property
    this.options.set("message", value);
    return this;
  }

  // The render method is where the JSX is rendered
  public async render() {
    const message = this.options.get("message");
    // You can render any component you want
    // this markup describes the shape/content of output image
    return <h1>{message}</h1>;
  }
}

Good to know: Rendering a text requires you to register at least one font.

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Usage

// Create an instance of the builder
const builder = new MyBuilder()
  // Set the message property
  .setMessage("Hello, World!");

// Render the builder into image
const result = await builder.build();
// ^ result is by default a png buffer