Persisting Custom Attributes During Fabric.js Canvas Serialization

Fabric.js automaticaly filters out non-standard properties when exporting canvas data via built-in serialization methods. By default, attributes appended directly to shape instances are stripped during the conversion process to prevent bloating the resulting payload with unsupported fields. When instantiating a drawing object, developers often ...

Posted on Wed, 17 Jun 2026 17:20:16 +0000 by marknt

Setting Local Images as Canvas Background with Fabric.js

Native Implementation To load a local image onto a Fabric.js canvas as a background, begin by initializing the canvas and handling file input. Due to browser security policies, direct access to file paths is restricted, so we use URL.createObjectURL() to obtain a temporary reference. <input type="file" id="imageLoader" on ...

Posted on Thu, 07 May 2026 10:38:52 +0000 by SZero