https://www.reddit.com/r/duckduckgo/comments/90ypqz/ddg_craw...
A comment from July 2018:
> We get our results from various sources, mostly Bing, Yahoo and Yandex (more info: https://duck.co/help/results/sources ) so if/when they introduce support for SPAs, we should get that too. I don't know what their plans are for this, however.