Object.keys not response in the Ionic APP

Ionic Framework Ionic Angular
2

Please don’t post images of text.

Since you have provided no code for anybody to try to reproduce the problem, all we can do is speculate wildly. I’ll speculate that you have a race condition that only presents under certain circumstances. One way to try to eliminate these sorts of problems is to turn on lots of strict compiler options, such as:

tsconfig.json

  "compilerOptions": {
...
    "strict": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictPropertyInitialization": true,
...
},
  "angularCompilerOptions": {
    "strictInjectionParameters": true,
    "strictInputAccessModifiers": true,
    "strictTemplates": true
  }

…then actually fix any problems that are flagged.