What steps should I take to ensure my paths in Ionic 4 Typescript are functioning properly?

Currently, I'm in the process of transitioning my Ionic 3 application to Ionic 4 with Typescript 3.1, but I'm facing challenges with the Typescript paths.

Within my tsconfig.json, I have the following setup:

"paths": {
    "@models": [ "src/models/index" ],
    "@services": [ "src/services/index" ],
    "@shared": [ "src/shared/index" ],
    "@app/*": [ "src/app/*" ],
    "@models/*": [ "src/models/*" ],
    "@services/*": [ "src/services/*" ],
    "@shared/*": [ "src/shared/*" ]
},

as well as this configuration in my src/tsconfig.app.json:

"paths": {
    "@models": [ "models/index" ],
    "@services": [ "services/index" ],
    "@shared": [ "shared/index" ],
    "@app/*": [ "app/*" ],
    "@models/*": [ "models/*" ],
    "@services/*": [ "services/*" ],
    "@shared/*": [ "shared/*" ]
},

Despite Visual Studio recognizing the files without any errors, when I attempt to run ionic serve, it fails to locate these files. Error messages like the following start popping up:

[ng] src/models/jobs/job.model.ts(1,33): error TS2307: 
    Cannot find module '@models/customers/customer.model'.

This occurs at the line:

import { ICustomerModel } from "@models/customers/customer.model";

Is there a way for me to ensure that ionic serve respects my Typescript paths?

typescriptionic4

Answer №1

I managed to find the solution.

I realized that I needed to include the following code snippet:

"baseUrl": ".",

within the compilerOptions section. Once I made this addition, everything started working as expected.

Here is the complete tsconfig.app.json file:

{
    "extends": "../tsconfig.json",
    "compilerOptions": {
        "baseUrl": ".",
        "paths": {
            "@models": [ "models/index" ],
            "@services": [ "services/index" ],
            "@shared": [ "shared/index" ],
            "@app/*": [ "app/*" ],
            "@models/*": [ "models/*" ],
            "@services/*": [ "services/*" ],
            "@shared/*": [ "shared/*" ]
        },
        "outDir": "../out-tsc/app",
        "module": "es6",
        "types": [ "node" ]
    },
    "exclude": []
}

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