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Build user interfaces from components React lets you build user interfaces out of individual pieces called components. Create your own React components like Thumbnail, LikeButton, and Video. Then combine them into entire screens, pages, and apps. React components are JavaScript functions. example videolist.js: function VideoList({ videos, emptyHeading }) { const count = videos.length; let heading = emptyHeading; if (count > 0) { const noun = count > 1 ? ‘Videos’ : ‘Video’; heading = count + ‘ ‘ + noun; } return ( <section> <h2>{heading}</h2> {videos.map(video => <Video key={video.id} video={video} /> )} </section> ); }
joe p screen scrape 2019, updated 4/2021 install: cd /home/eturock mkdir joep && cd joep npm init –yes apt get install npm npm install request-promise-native cheerio jsonfile –save Request is the library we’re using to make HTTP requests, cheerio will parse our document body and allow us to access it with Jquery-like navigation. We’re using request-promise-native here to make life easier a little bit further on. Jsonfile combines Node’s native fs library with JSON parsing and conversion. This one is not essential, but I think it keeps it cleaner to not have to read file, parse JSON, do stuff, convert to JSON, and write to file again. Our first pass won’t really use this, but we’ll get to it later.
install node.js with npm using a package installer from the following (use an LTS version): https://nodejs.org/en/download/package-manager
