TypeScript does not throw a compiler error for incorrect type usage

In my current setup using Ionic 3 (Angular 5), I have noticed that specifying the type of a variable or function doesn't seem to have any impact on the functionality. It behaves just like it would in plain JavaScript, with no errors being generated. I'm wondering if there is a specific configuration file, such as tsconfig.json, that needs to be adjusted or if there is something that I am overlooking. An example of what I'm experiencing:

foo : string;

foo = someObject as SomeNonExistentClass;

One interesting observation is that when I use 'ionic serve', the errors are displayed correctly but upon saving one of the affected files, all the errors disappear. This issue seems to occur sporadically during a save/recompile process.

typescriptecmascript-6ionic3angular5static-typing

Answer №1

It is likely that there are lint errors present, which may not show up when running the ionic serve command. One solution could be to install a ts-lint extension in your code editor, allowing you to identify and address lint errors during development.

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