progressive-web-apps

问题 If I have a PWA I might want to ask my user to add it to their launcher, but I don't want to ask this if it's actually launched from the launcher. Is there any way to detect this from javascript? 回答1: For android, you should only prompt users to install after receiving a beforeinstallprompt event. This event will only be fired if the PWA has not already been installed. window.addEventListener('beforeinstallprompt', (e) => { e.preventDefault(); deferredPrompt = e; // Update UI notify the user

问题 If I have a PWA I might want to ask my user to add it to their launcher, but I don't want to ask this if it's actually launched from the launcher. Is there any way to detect this from javascript? 回答1: For android, you should only prompt users to install after receiving a beforeinstallprompt event. This event will only be fired if the PWA has not already been installed. window.addEventListener('beforeinstallprompt', (e) => { e.preventDefault(); deferredPrompt = e; // Update UI notify the user

问题 I have angular 8 app. Inside this app I have three projects. I want to add @angular/pwa with this command ng add @angular/pwa && ng build --prod But when PWA is installed I get error ERROR in ./node_modules/@angular/service-worker/fesm2015/service-worker.js Module build failed: Error: ENOENT: no such file or directory, open 'C:\Development\Repositories\app\node_modules@angular\service-worker\fesm2015\service-worker.js' and in CHROME CONSOLE i get Uncaught TypeError: Cannot read property 'id'

问题 I have angular 8 app. Inside this app I have three projects. I want to add @angular/pwa with this command ng add @angular/pwa && ng build --prod But when PWA is installed I get error ERROR in ./node_modules/@angular/service-worker/fesm2015/service-worker.js Module build failed: Error: ENOENT: no such file or directory, open 'C:\Development\Repositories\app\node_modules@angular\service-worker\fesm2015\service-worker.js' and in CHROME CONSOLE i get Uncaught TypeError: Cannot read property 'id'

问题 Uncaught (in promise) Error: Manifest fetch failed! (status: 404) at Driver. (ngsw-worker.js:2368) at Generator.next () at fulfilled (ngsw-worker.js:1780) After deploy my angular 7 project (PWA) got this error. any solution? 回答1: I had the same problem and I found the solution here. If you upload a .json file to your Windows Azure website and try to access it, it would give you a 404 File Not Found error because the MIME Type of .json is not set by default. This also applies in general to any

问题 I'm writing a progressive web app for an android tablet which should be able to read and write to a device with an embedded Telit BLE module via a BLE connection. I am able to open a BLE connection and discover services and characteristics. I am unable to establish a connection over BLE using Telit's Terminal I/O (TIO) protocol. My remote (server) device is a Falcom Fox3 tracker unit. A notification event can be read from the Fox3 serial port when a connection is established. This has been

问题 We looking to develop an "App" which would have the ability to record the details of a damaged car for assessors. The idea is that a small number of assessors would have company iPads. Then when car is damaged and returned to the car yard they can visit take photos, enter some details and then upload them into the main system later. Some of the car yards may be in areas that do not have internet coverage, so offline capability is required. Our initial thoughts were to develop an IOS App for

问题 We looking to develop an "App" which would have the ability to record the details of a damaged car for assessors. The idea is that a small number of assessors would have company iPads. Then when car is damaged and returned to the car yard they can visit take photos, enter some details and then upload them into the main system later. Some of the car yards may be in areas that do not have internet coverage, so offline capability is required. Our initial thoughts were to develop an IOS App for

问题 We looking to develop an "App" which would have the ability to record the details of a damaged car for assessors. The idea is that a small number of assessors would have company iPads. Then when car is damaged and returned to the car yard they can visit take photos, enter some details and then upload them into the main system later. Some of the car yards may be in areas that do not have internet coverage, so offline capability is required. Our initial thoughts were to develop an IOS App for

问题 We looking to develop an "App" which would have the ability to record the details of a damaged car for assessors. The idea is that a small number of assessors would have company iPads. Then when car is damaged and returned to the car yard they can visit take photos, enter some details and then upload them into the main system later. Some of the car yards may be in areas that do not have internet coverage, so offline capability is required. Our initial thoughts were to develop an IOS App for