![]() ![]() ![]() User sessions are surprisingly long: someone might have your website open in a tab for weeks at a time. So you need two round-trips to start rendering.Īnd then there’s the question of updating code-split bundles. Most bundle splitting techniques require you to load that ‘index bundle’, and then only once that JavaScript is loaded and executed does your browser know which ‘page bundle’ it needs. This sort of solves the problem, but it’s not great. So you load the About page and what your browser downloads is an ‘index’ bundle, and then that ‘index’ bundle loads the ‘about page’ bundle. ![]() Bundle splitting ‘solves’ this problem by creating many JavaScript bundles that can lazily load each other. Someone who lands on the About page is also downloading 20 other pages in the same application bundle. At some point, this becomes a real problem. Unlike with a traditional multi-page app, that growth affects every visitor: you download the whole app the first time that you visit it. Bundle splitting.Īs your React application grows, the application bundle grows. A lot of the optimizations we’re deploying to speed up these things, things like bundle splitting, server-side rendering, and prerendering, are triangulating what we had before the rise of React.Īnd they’re kind of messy optimizations. Listing pages, static pages, blogs - these things are increasingly built in React, but the benefits they accrue are extremely narrow. The less interactive parts don’t benefit much from React. Same with the Observable runtime, the juicy center of that product: it’s very performance-intensive and would barely benefit from a port. The level of abstraction that React works on is too high, and the cost of using React - in payload, parse time, and so on - is too much for any company to include it as part of an SDK. Mapbox GL, for example, is vanilla JavaScript and probably should be forever. I helped build the editors in Mapbox Studio and Observable and for the most part, React was a great choice.īut there’s a lot on either side of that sweet spot. Complex forms that require immediate feedback, UIs that need to move around and react instantly. ![]() There is a sweet spot of React: in moderately interactive interfaces. It started with a few major popular websites and has crept into corners like marketing sites and blogs. The backend is an API that that application makes requests against.The main UI is built & updated in JavaScript using React or something similar.The two key elements of this architecture are something like: Maybe they’ll become collectibles with the ghouls among us.The emerging norm for web development is to build a React single-page application, with server rendering. Yes, adults can smoke, but they’re constantly bombarded by higher taxes, more restrictions on the products available to them, more limits on advertising, and more rules on where they can light up.Īnd soon they’ll be exposed to the lurid cigarette packs. Unfortunately, it hasn’t quite worked out that way. In a free society that respects individuals, that should end most political battles over smoking: let’s prohibit kids from lighting up, punish whoever sells or markets cigarettes to them… and let grown-ups live their lives as they please. In fact, they’re so well known that adults who smoke are justifiably viewed as willingly taking those risks. The medical hazards of cigarette smoking are well established and well known. Knowledge was associated with perceived risk of smoking-related illnesses across disease categories. Premature death was identified as a risk by 95% of smokers yet only 63.5% reported that disability could also result from smoking. The average percentage of knowledge items correct for each disease category included cardiovascular (93%), pulmonary (94%), oral health diseases (89%), smoking-related cancers (71%), and reproductive risks (44%). Here are the results of a representative study of smokers’ knowledge of the hazards: That approach, of course, assumes that smokers and others aren’t aware of the dangers of smoking, but that’s far from the case. The introduction of these warnings is expected to have a significant public health impact by decreasing the number of smokers, resulting in lives saved, increased life expectancy, and lower medical costs. (I have deliberately suppressed the display of the ghoulish photos here to protect children and the more sensitive from these images and to avoid promoting the FDA’s overkill on warnings.) Rotted lungs and teeth, chest holes, dead and grieving people are just a few of the lurid photos in living color that the Food and Drug Administration will require on packages. Get ready to see nine sensationalistic images depicting the dangers of smoking on cigarette packs beginning September 2012. ![]()
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