Facing a strange issue with angular 5 development vs production code

Question

The following code is working perfectly fine in development mode: ng serve --open

addDriver(driver: any) {
   return fromPromise(this.db.insert('driver', driver));
}

But fails with the following error when deployed to production with this error: ng build --prod

ERROR TypeError: Object(...) is not a function

Getting this error on this.db.insert

I am guessing it has something to do with ASI(Automatic Semicolon Insertion)

Any help is highly appreciated.

Thanks in advance.

Answer 1

As you guessed it correctly, ASI rule works only on specific statements as explained ECMAScript® 2016 Language Specification

It includes following cases -

• empty statement
• var statement
• expression statement
• do-while statement
• continue statement
• break statement
• return statement
• throw statement

Best solution is to avoid relying on ASI as it might not be able to work in all scenarios.

References -

SO Question 1

SO Question 2