This is the Lightning Web Components search box demonstration component. This was built for National Parks Data mashup app showing the use of open source Lightning Web Components running outside of Salesforce.
This was demod at the Salesforce TDX '19 conference during the launch of open source Lightning Web Components. Find out more at https://lwc.dev.
To see the demo app that uses this component visit https://github.com/kevinv11n/lwc-mashup