A rather geeky/technical weblog, est. 2001, by Bramus
I had a bug in a React Native app which only occurred on the very first launch of the app, right after install. The bug was situated in a complex Redux Saga which bootstraps the application and populates the Redux store with things like an (anonymous) API token, (remote) config settings, etc. The bug didn’t …
Continue reading “Launch a React Native app with “Debug JS Remotely” enabled by default”
AbortControllerIn How to Cancel Your Promise Seva Zaikov has done a nice writeup exploring several attempts on how to cancel promises. After also touching generators and async/await the conclusion is that you can’t actually cancel a promise with the techniques mentioned (you may introduce some workarounds to track the cancelled state yourself, yet that won’t …
Continue reading “Cancel a JavaScript Promise with AbortController“
setTimeout “other” argumentsWhen using setTimeout, it’s not needed to wrap a function with arguments into an anonymous function and call it from there. What you can do instead is pass the function in via its name (as you would do with a function that has no arguments), and pass in the arguments via the 3rd, 4th, 5th, …
Continue reading “JavaScript’s setTimeout “other” arguments”
This tweet is currently making rounds on Twitter: You can access it via System Preferences>Users & Groups>Click the lock to make changes. Then use "root" with no password. And try it for several times. Result is unbelievable! — Lemi Orhan Ergin (@lemiorhan) November 28, 2017 And yes, that actually works: enter root as a username, …
Continue reading “Login with root and no password on any mac running macOS High Sierra”
import()”
UPDATE June 2019: This feature has now advanced to Stage-4 and will be part of the ES2020 Specification! 🎉 One of the recent ECMAScript proposals that landed in Chrome 63 is dynamic import(): Dynamic import() introduces a new function-like form of import, which allows one to import on demand. It returns a promise for the …
Continue reading “ESNext: Dynamically import ES modules with “dynamic import()””
Since early October it’s possible to enable Two Factor Authentication with your NPM account. 2FA is another layer of defense for your account, preventing third parties from altering your code even if they steal or guess your credentials. This is one of the easiest and most important ways to ensure that only you can access …
Continue reading “TIP: Enable Two Factor Authentication (2FA) with your NPM account”
See the Pen Twitter Tweet URL Generator by Bramus (@bramus) on CodePen. Today I learned that Twitter totally ignores the username in the “tweet detail route” on their website. This allows you to view details of a (public) tweet when knowing only its ID, without needing to access the Twitter API (which is the default …
Continue reading “Accessing a tweet using only its ID (and without the Twitter API)”
react-native-maps-directions – Directions/Routing component for react-native-mapsOne of the things I found missing in the aforementioned react-native-maps was the ability to route between to coordinates. Combining the feedback from the related issues on GitHub (#52, #778, and #929) I’ve created a standalone component that does exactly that. The MapViewDirections component can route between an origin and destination coordinate. As routing is …
Continue reading “react-native-maps-directions – Directions/Routing component for react-native-maps“
Whilst initially implementing react-native-maps into a project I noticed that the iOS Simulator didn’t quite like it. Whenever the Mapview was visible on the screen, the Simulator was maxing out on something. Turns out the OpenGLES.framework that comes with XCode 9.0 – and not react-native-maps itself – is the culprit. That version is buggy and …
Continue reading “XCode 9.0: Fixing a Slow/Unresponsive iOS Simulator”
imports with Webpack’s resolve.aliasOne of the things I find annoying when using import in my JS code is the fact that you need to refer to other local files using (relative) paths. Like so: // Without resolve.alias 😭 import Modal from ‘../../../components/objects/modal/modal’; Having a background in PHP – where you have include paths and autoloaders – I essentially …
Continue reading “Easier imports with Webpack’s resolve.alias“