chart.jsで時系列のグラフ - iMind Developers Blog
https://blog.imind.jp/entry/2020/02/22/151900
Chart.js [EDIT]
Chart.jsによるグラフ作成（概要と目次）＜Javascript＜木暮仁
http://www.kogures.com/hitoshi/javascript/chartjs/index.html
Chart.js [EDIT]