Chart.js

Chart.js | Open source HTML5 Charts for your website
Simple yet flexible JavaScript charting library for the modern web

chartjs/Chart.js: Simple HTML5 Charts using the <canvas> tag @GitHub

MIT license

docs: Chart.js | Chart.js

chart.js - npm

popular: 3+M downloads/week

Chart.js - Wikipedia

Chart.js is a free, open-source JavaScript library for data visualization, which supports eight chart types: bar, line, area, pie (doughnut), bubble, radar, polar, and scatter. Created by London-based web developer Nick Downie in 2013, now it is maintained by the community and is the second most popular JavaScript charting library on GitHub by the number of stars after D3.js, considered significantly easier to use though less customizable than the latter. Chart.js renders in HTML5 canvas and is widely covered as one of the best data visualization libraries. It is available under the MIT license