Some of the samples make reference to a `components` object. This is an artifact of using a module bundler to build the samples. The creation of that components object is shown below. If chart.js is included as a browser script, these items are accessible via the `Chart` object, i.e `Chart.Tooltip`.
<<<@/docs/scripts/components.js
[File on github](https://github.com/chartjs/Chart.js/blob/master/docs/scripts/components.js)