laser-pen VS echarts

Even better if you can add a trail to it to make circling things much nicer. See this 'laser-pen' project for an example of how such a trail would look like.

And I think if you appropriately combine the APIs provided in laser-pen, you can also achieve the effect of color gradients.

ECharts was originally a Baidu project, released under https://github.com/ecomfe/echarts (ecomfe = "E-commerce frontend"?). They still maintain some of the auxiliary libraries.

I've been using it since around ... 2018-ish[0]? ... as a replacement for Google Charts. It was my first time using a big library from one of the Chinese tech giants -- basic docs and tutorials in English, then all the advanced stuff (and comments) written in Chinese. I was impressed by how comprehensive the charts library was, and how they'd obviously invested a lot of brainwork into the configuration system. IMO it's one of the highest-quality data visualization libraries in JavaScript unless you're willing to dive deep into something like d3.js.

The blog post's author describes running echarts in a headless Chrome, though, which seems insane to me. It's JavaScript rendering to a -- can't it run in Node with https://github.com/Automattic/node-canvas ?

[0] A small publicly-accessible example: https://john-millikin.com/reddit-front-page-2018#by-domain