v7 js - BONGDATV

It's the thing that takes our JavaScript and executes it while browsing with Chrome. V8 is the JavaScript engine i.e. it parses and executes JavaScript code. The DOM, and the other Web Platform APIs (they all makeup runtime environment) are provided by the browser.

My D3.js graph works fine in v4 but not in v7. I know I have to use the ".then" clause in v7 but I would like to understand the meaning of the function below " from :...(d, i, columns ...) ... to ...(return d) ... What does it do exactly ? How can I code this function to use it in v7 ?

See the D3 gallery for more forkable examples. Observable includes a few D3 snippets when you click + to add a cell (type "d3" when the cell menu is open to filter), as well as convenient sample datasets to try out D3 features. Or upload a CSV or JSON file to start playing with your data.

What is the d3.js v7 equivalent of d3.scale.ordinal() and how would I use it for colour ranges? In v3.5.11 I could use: var colourScale = d3.scale.ordinal() .domain(["One", "...