ok many thanks on web browser it seems to work, I wil try it on the device got the error
Error: Metadata version mismatch for module XXXnode_modules/@ionic-native/core/decorators.d.ts, found version 4, expected 3
at StaticSymbolResolver.getModuleMetadata (XXXnode_modules/@angular/compiler/bundles/compiler.umd.js:25616:34)
at StaticSymbolResolver._createSymbolsOf (XXXnode_modules/@angular/compiler/bundles/compiler.umd.js:25404:46)
at StaticSymbolResolver.getSymbolsOf (XXXnode_modules/@angular/compiler/bundles/compiler.umd.js:25385:14)
at XXXnode_modules/@angular/compiler/bundles/compiler.umd.js:24241:30
at Array.forEach (native)
at extractProgramSymbols (XXXnode_modules/@angular/compiler/bundles/compiler.umd.js:24240:79)
at AotCompiler.analyzeModulesAsync (XXXnode_modules/@angular/compiler/bundles/compiler.umd.js:23796:47)
at CodeGenerator.codegen (XXXnode_modules/@angular/compiler-cli/src/codegen.js:32:14)
at Function.NgTools_InternalApi_NG_2.codeGen (XXXnode_modules/@angular/compiler-cli/src/ngtools_api.js:73:30)
at XXXnode_modules/@ionic/app-scripts/dist/aot/aot-compiler.js:182:73
when I build for ios device.
I think there is still a failure in my package.json