Exporting an enum without specifying a module flag

Question

Exporting an enum without specifying a module flag

I have a piece of typescript code that defines an enum in file1.ts:

// file1.ts
export enum Status {
    Active = 1,
    NotActive = 0
}

In another part of my project, I import the Status enum from file1:

// file2.ts
import {Status} from "./file1";
...

However, when I try to compile the code, I encounter the following error message:

error TS1148: Cannot compile modules unless the '--module' flag is provided. 
Consider setting the 'module' compiler option in a 'tsconfig.json' file.

Here is a snippet of my tsconfig file:

{
    "compilerOptions": {
        "noImplicitAny": true,
        "removeComments": true,
        "preserveConstEnums": true,
        "outFile": "javascript/app.js",
        "sourceMap": true,
        "target": "es5",
        "declaration": false
    },
    "files": [
        "app.ts"
    ]
}

Instead of exporting modules, I want to create a standalone file containing all the source code to use in the browser. How can I refactor the enum to avoid this compilation error and achieve a self-contained file?

Thanks!

enums typescript

Answer 1

Answer №1

In order to create a self-contained file with all the source code for browser use, I prefer not to export any modules.

If you want to achieve this, follow these steps:

Eliminate the export keyword from file1.ts
Delete the entire import statement from file2.ts
Include
```
/// <reference path="file1.ts" />
```
at the beginning of file2.ts

After making these changes, the concatenated output of file1.ts and file2.ts will be contained in app.js.

Answer 2

In order to create a self-contained file with all the source code for browser use, I prefer not to export any modules.

If you want to achieve this, follow these steps:

Eliminate the export keyword from file1.ts
Delete the entire import statement from file2.ts
Include
```
/// <reference path="file1.ts" />
```
at the beginning of file2.ts

After making these changes, the concatenated output of file1.ts and file2.ts will be contained in app.js.

Answer 3

Answer №2

It seems that in your situation, there is no module present. If you are having difficulty including an enum in a module that is declared in another file, like a component, here is how you can do it:

Define your enum: Within your component, right after your imports and before the @Component declaration, define your enum. Avoid making it a const.

export enum MyEnum { DEFAULT = 'default', WORKING = 'working', COMPLETE = 'complete' }

This will make your enum accessible to your component class without creating a circular reference by declaring it in your module file.

Import your enum: In the imports section of your module, import your enum and provide it with an alias.

import { MyComponent, MyEnum as _myEnum } from "./my-component.component";

Re-define your enum: Within your module, after the imports and before the @NgModule, export and declare your enum as a const.

export const MyEnum = _myEnum;

Now, when you import your module, MyEnum will be readily available for referencing.

If you need to access the enum in the template, assign the enum a local type that belongs to the component class. Inside your component class, declare:

private myEnum = MyEnum;//myEnum can now be accessed in the template.

Answer 4

It seems that in your situation, there is no module present. If you are having difficulty including an enum in a module that is declared in another file, like a component, here is how you can do it:

Define your enum: Within your component, right after your imports and before the @Component declaration, define your enum. Avoid making it a const.

export enum MyEnum { DEFAULT = 'default', WORKING = 'working', COMPLETE = 'complete' }

This will make your enum accessible to your component class without creating a circular reference by declaring it in your module file.

Import your enum: In the imports section of your module, import your enum and provide it with an alias.

import { MyComponent, MyEnum as _myEnum } from "./my-component.component";

Re-define your enum: Within your module, after the imports and before the @NgModule, export and declare your enum as a const.

export const MyEnum = _myEnum;

Now, when you import your module, MyEnum will be readily available for referencing.

If you need to access the enum in the template, assign the enum a local type that belongs to the component class. Inside your component class, declare:

private myEnum = MyEnum;//myEnum can now be accessed in the template.

Exporting an enum without specifying a module flag

Answer №1

Answer №2

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