A: This does not work. GoJS initializes the canvas and draws the watermark immediately upon instantiation. Hiding the container does not prevent the drawing commands.
However, if you have ever used the unlicensed version of GoJS in a development environment—or accidentally deployed a trial version to production—you have seen it: the dreaded . This semi-transparent overlay typically reads "Trial Version" or "GoJS Evaluation" and sits stubbornly on top of your beautiful diagrams.
There is no secret backdoor. The only "gojs remove watermark" solution that works 100% of the time, forever, is the official license key. Frequently Asked Questions (FAQs) Q: Can I remove the GoJS watermark in development only? A: No. The trial version always shows a watermark. You must either purchase a license or use an open-source alternative.
Remove the watermark by writing this line:
import * as go from 'gojs'; // GOOD: Set this immediately, outside any component go.GraphObject.licenseKey = process.env.REACT_APP_GOJS_LICENSE;
After applying your license key, run this quick verification script in the browser console:
GoJS re-renders the diagram on every interaction (zoom, pan, drag, drop). The watermark is recreated on every draw cycle. CSS hiding might work for one frame, but the canvas redraw will bring it back. Furthermore, the watermark is often rendered directly onto the canvas as a rasterized image, not as a separate DOM element. Claim #2: Patching the go.js / go-debug.js File Advanced users try to use a Hex editor or a JavaScript beautifier to search for the string "watermark" or "Trial Version" inside the go.js file and manually delete the code.
go.GraphObject.licenseKey = "YOUR_OFFICIAL_KEY"; Everything else is just breaking the law and breaking your code.