Rxjs 5.5 “ Property ‘map’ does not exist on type Observable…’”

I’ve just converted an Ionic app to Angular 5 which relies on rxjs 5.5+. One of the odd errors that i found and didn’t quite understand why was “Property ‘map’ does not exist on type Observable” (or any operator like take…

Ionic 2 UI/Alert from a Angular 2 Service

Note: Updated from Beta 8 to Release Candidate.

When you create an Ionic 2 page/component your constructor can inject the NavController like this:

constructor(private nav:NavController) {}

Fixing IOS 11 web apps (apple-mobile-web-app-capable)

Turning Off Change Detection for Performance in Ionic

Angular’s change detection is usually quite great, but I found a case where it’s performance was terrible on a page that contained a long vertical list of horizontal lists of images (think the soundcloud home page where there are lots of…

Analyse your Ionic App Size

Here’s a tip on analyzing your bundle size, the dependencies your app relies on and how to quickly identify…

Owin Shutdown

Need to put some shutdown code in your Owin service? Here’s the non obvious way using CancellationToken.

using System;
using System.Threading;
using System.Threading.Tasks;
using Owin;
using Microsoft.Owin;
using Microsoft.Owin.Host.SystemWeb;

Fixing App Store upload problem with NSPhotoLibraryUsageDescription and PhoneGap Build

After submitting an app to the App Store, Apple added a new requirement in iOS 10 related to any apps using the Camera, Bluetooth, Photo Library etc. Apple will email you about the…

Gulp Speedup

Our gulp build task was taking a really long time. After a bit of investigation the problem was found to be minification / uglifying of files that were already minified (in this case jquery-1.11.1.min.js and others)

return gulp.src([sourceDir + ‘/*.js’])…