open-nomad/ui/app/templates/components/json-viewer.hbs

<IvyCodemirror
  data-test-json-viewer
  @value={{this.jsonStr}}
  @options={{hash
    mode="javascript"
    theme="hashi-read-only"
    screenReaderLabel="Job definition"
    tabSize=2
    lineNumbers=true
    readOnly=true
  }} />