Platform:
Date:
For the 19-05-13 data and onwards, DE changed the popularity field to "Popularity of this Riven Type being traded in relation to the most popular Riven Type in the list". Which means all manners of calculation we had before hand on estimating sales are completely broken. We really have no choice but to point this out, and hope DE will fix this. In the mean time, please note that the "Est. Sales" field is unreliable.
This project is no longer being maintained. Last available data is 20th March 2020. DE appears to have abandoned the API, and does not seem willing to accept further input, and improve the API. I share the same sentiments as the developer maintaining the JSON dataset, which can be read in the repository.

For what its worth, the classic version still works as a simple viewer.

Loading Rivens data...
Failed to load Rivens data!

Showing {{ vm.tableParams.total() }} parsed Rivens data from Kanjirito/rivens-json-browse-back-end.

Type: {{ riven.itemType }} Weapon: {{ riven.compatibility }} -- Veiled -- Rerolled: Yes No Avg: {{ riven.avg | number: 2 }} +{{ riven.avg_diff | number: 2 }} Median: {{ riven.median | number: 2 }} +{{ riven.median_diff | number: 2 }} StdDev: {{ riven.stddev | number: 2 }} +{{ riven.stddev_diff | number: 2 }} Min: {{ riven.min | number }} +{{ riven.min_diff | number: 2 }} Max: {{ riven.max | number }} +{{ riven.max_diff | number: 2 }} Pop: {{ riven.pop | number: 2 }} +{{ riven.pop_diff | number: 2 }} Est. Sales: {{ riven.sales | number: 2 }} +{{ riven.sale_diff | number: 2 }}