Upload Files

Use when: Form authors need to add logos, images, or other files.

Try this

In the Designer, click the logo area at the top of the form (Add logo... next to the title) and pick an image. Requests shows POST /api/files, then PUT /api/forms/support.
Data shows the JSON schema's logo as /api/files/<id>: a URL, not Base64.
The logo in the Designer loads from GET /api/files/<id>.

Commercial client licence: without SURVEYJS_LICENSE_KEY the component shows a licence banner.

Source on GitHub Definition: shared/definitions/creator-load-save.json Commercial client licence: without SURVEYJS_LICENSE_KEY the component shows a licence banner

Client · shared/client/creator-uploads.js · sjs:creator-uploads.client View on GitHub

// Images and logos added in Creator: store them, keep only the URL in the definition
creator.onUploadFile.add(async (_, options) => {
  const body = new FormData();
  options.files.forEach(file => body.append("files[]", file));   // POST /api/files; "files[]" for PHP
  const [id] = await fetch("/api/files", { method: "POST", body }).then(r => r.json());
  options.callback("success", `/api/files/${id}`);                // the endpoint returns ids: the definition keeps a URL
});