Angular 5 app not working in ios8 (Browserstack) - ios

Question

I've tested my Angular 5 app on an iPhone 6 running IOS8 (Safari) and in Browserstack. The angular app doesn't run, I just get an empty page and this Javascript error.
Any suggestions?
This is my package.json file. I'm thinking that some package that I added here is causing some conflict and preventing the app from displaying. Previously I had the app able to run in IOS8, but that was with Angular 4.4 and I wasn't using mdbootstrap library.
{
"name": "XXXX",
"version": "1.0.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e",
"i18n": "ng-xi18n"
},
"private": true,
"dependencies": {
"#agm/core": "^1.0.0-beta.2",
"#angular-devkit/schematics": "0.0.34",
"#angular/animations": "^5.0.3",
"#angular/common": "^5.0.3",
"#angular/compiler": "^5.0.3",
"#angular/core": "^5.0.3",
"#angular/forms": "^5.0.3",
"#angular/http": "^5.0.3",
"#angular/platform-browser": "^5.0.3",
"#angular/platform-browser-dynamic": "^5.0.3",
"#angular/router": "^5.0.3",
"applicationinsights-js": "^1.0.8",
"bootstrap": "^3.3.7",
"bootstrap-select": "^1.12.4",
"chart.js": "^2.5.0",
"core-js": "^2.4.1",
"easy-pie-chart": "^2.1.7",
"font-awesome": "^4.7.0",
"hammerjs": "^2.0.8",
"jquery": "^3.2.1",
"libphonenumber-js": "^0.4.40",
"ng-autosize": "^1.1.0",
"ng-mdb-pro": "XXXX",
"npm-check-updates": "^2.13.0",
"rxjs": "^5.4.2",
"screenfull": "^3.3.0",
"zone.js": "^0.8.14"
},
"devDependencies": {
"#angular/cli": "^1.5.5",
"#angular/compiler-cli": "^5.0.3",
"#angular/language-service": "^4.3.0",
"#types/applicationinsights-js": "^1.0.2",
"#types/jasmine": "~2.8.2",
"#types/jasminewd2": "~2.0.2",
"#types/node": "~6.0.60",
"codelyzer": "~4.0.1",
"jasmine-core": "^2.8.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.2.0",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"karma-junit-reporter": "^1.2.0",
"protractor": "~5.2.0",
"ts-node": "~3.3.0",
"tslint": "^5.3.2",
"typescript": ">=2.4.2 <2.5.0"
}
}

Answer 1

Had a similar problem. It should be resolved by providing correct polyfills.
you can find browser support info here https://angular.io/guide/browser-support
If you use JIT compiler (not AOT) then safari needs at least ES7 reflect polyfill.
Safari 7 & 8 need also ES6
If you still use the old intl based pipes then do not forget to include them.
For older browsers core-js/es/... imports usually resolve the issues.
Go to your src/polyfills.ts and enable desired polyfills.
There is also a fetch polyfill mentioned in the readme of the generated project, that is not included in polyfill.ts.
import 'whatwg-fetch'; // Run `npm install --save whatwg-fetch`

Answer 2

$ ng build --mangle safari10=true --prod

Answer 3

Follow the next steps
Execute command to generate file .browserslistrc
npx browserslist
Into the file set the last version until you get that you need, in my case I need work with safari 10, then i set the file ".browserslistrc" :
last 2 Chrome version
last 2 Firefox version
last 2 Edge major versions
last 5 Safari major versions
last 5 iOS major versions