{
  "id": 19906324,
  "title": "How to Generate Editable Multi-Layer Fabric.js Templates via REST API (Prisma V1.0 Tutorial)",
  "url": "https://urgent.news/2026/11/14/how-to-generate-editable-multi-layer-fabric-js-templates-via-rest-api",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-11-14T02:34:33.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/devkenan/how-to-generate-editable-multi-layer-fabricjs-templates-via-rest-api-prisma-v10-tutorial-4cl8"
  },
  "original_language": "en",
  "account": "Generating editable multi-layer Fabric.js templates via REST API requires using Prisma V1.0 and following a specific process. PNG images are not ideal for designs that need editing, such as retyping a headline or swapping a photo, as they are a dead end.\n\nThe API provides canvas JSON in the legacy-fabric-v1 format, which includes live text objects, native shapes, and image objects. It also offers private raster layers (PNG) and a JPEG preview, along with your own photos placed as separate image objects (up to five).\n\nBefore starting, you need a Prisma developer workspace, an API key with specific permissions, and Prisma Credits. The process involves submitting a generation request, polling the job, downloading the editable template, and loading it into Fabric.js. The API response includes a job ID, prompt, aspect ratio, material images, reference image, and idempotency key header.\n\nWhen polling the job, handle rate limits and errors appropriately, and download the template files from the API on your backend server to ensure security. Load the template JSON into Fabric.js for users to edit the text, shapes, and photos as needed. Be aware of the limits and good habits, such as respecting the Retry-After header and handling errors effectively.",
  "summary": "Most image APIs give you a PNG. If your product needs designs that people keep editing, like retyping a headline, swapping a photo or translating a banner, a PNG is a dead end. This tutorial generates a complete design with Prisma V1.0 and gets it back as an editable multi-layer template you can load into Fabric.js. What comes back: canvas JSON in the legacy-fabric-v1 format, with live text…",
  "key_points": [
    "Use Prisma V1.0 for editable Fabric.js templates",
    "Generate canvas JSON in legacy-fabric-v1 format",
    "Download template JSON into Fabric.js for editing"
  ],
  "editors_take": "Moving from static PNG images to JSON-based templates allows developers to offer users fully customizable designs where text and shapes remain live and editable through the Prisma API.",
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}