Sandbox sites
LightningChart JS works without a license when deployed to specific popular sandbox sites. The current listed of enabled sandbox sites can be found here:
This can be used to troubleshoot and share information related to use of LightningChart JS without having to expose your personal license keys on the internet. You can, for example, post an interactive code snippet which displays a chart without having to supply a license.
To do this, simply omit the license, and deploy the application to one of the allowed domains.