That's just a developer library. There are so many of them... Pixijs, D3 based ones etc ... The authoring tool that flash had was like this: https://m.youtube.

That's just a developer library. There are so many of them... Pixijs, D3 based ones etc ... The authoring tool that flash had was like this: https://m.youtube.com/watch?v=kHOQkooK0qY https://m.youtube.com/watch?v=kHOQkooK0qY . 2 tutorials like this and you'd have everything you need to make a multimedia website