| /** | |
| * Primary application logic for our Functional Programming blog example | |
| * See related blog series at: http://www.datchley.name/tag/functional-programming/ | |
| * Version: 2.0 | |
| */ | |
| // A simple, resuable comparison for '>=' | |
| function greaterThanOrEqual(a, b) { | |
| return a >= b | |
| } |
All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
Composition of <Route> elements in React Router is changing in v6 from how it worked in v4/5 and in Reach Router. React Router v6 is the successor of both React Router v5 and Reach Router.
This document explains our rationale for making the change as well as a pattern you will want to avoid in v6 and a note on how you can start preparing your v5 app for v6 today.
In React Router v5, we had an example of how you could create a element](https://github.com/remix-run/react-router/blob/320be7afe44249d5c025659bc00c3276a19f0af9/packages/react-router-dom/examples/Auth.js#L50-L52) to restrict access to certain routes on the page. This element was a simple [wrapper around an actual element that made a simple decision: is the user authenticated or not? If so, ren