model view controller – TypeScript exports is not defined – Code Utility

Question 1

I’m attempting to make use of export and import but it surely not working I get an error

Here is my code HTML :

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta title="viewport" content material="width=device-width, initial-scale=1.0">
</head>
<physique>
    @RenderBody()

    <script src="https://codeutility.org/2023/02/10/model-view-controller-typescript-exports-is-not-defined-code-utility/~/scripts/user.js"></script>
    <script src="~/scripts/main.js"></script>
</physique>
</html>

User.ts :

export class User {
    firstName: string;
    lastName: string;
}

essential.ts

import { User } from "./user";

Here is additionally screenshot of exception :

Question 2

You have a few choices:

Option 1: Use a module loader like Webpack, Browserify, and so forth.

Option 2: If you simply wish to compile *.ts to *.js with none module imports or exports, set compilerOptions.module to “none” in your tsconfig.json. Note that you just received’t have the ability to export/import modules if you set compilerOptions.module to “none”.

Question 3

attempt the next modifications

HTML:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta title="viewport" content material="width=device-width, initial-scale=1.0">
</head>
<physique>
    @RenderBody()

    <!-- <script src="https://codeutility.org/2023/02/10/model-view-controller-typescript-exports-is-not-defined-code-utility/~/scripts/user.js"></script> --> <!-- not longer wanted -->
    <script src="~/scripts/main.js"></script>
</physique>
</html>

tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es5",
    "sourceMap": true,
    "outFile": "~/scripts/main.js",
    "lib": 
      "dom",
      "es2015",
      "es5",
      "es6"
    
  }
}

with this config your output is just one js file what will be uglified wunderfull, containing all referenced recordsdata in the principle.ts. i simply don’t know if ~/ works or if it’s important to set the trail relative to the config file, i’m not working with linux.

READ : Typescript file-naming conventions

User.ts

class User {
    firstName: string;
    lastName: string;
}

Main.ts:

/// <reference path="User.ts" />

// import { User } from "./user"; // not wanted if referenced
console.log(new User());

all reference declarations should be written at the start of the file

Question 4

TypeScript by default makes use of node module decision. Node.js / CommonJS makes use of exports key phrase. However, CommonJS doesn’t run in browser and not using a module loader or module bundler. Hence, you want browserify or webpack to get it working in browser.

Check out this hyperlink https://www.typescriptlang.org/docs/handbook/gulp.html

You may also set module setting to none in compiler choices part in tsconfig.json:

{
“compilerOptions”: {
“target”: “es5”,
“module”: “none”
}
}

Question 5

I now use Parcel to do the ugly stuff of transcoding and so forth.
My best config is the next:

tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "sourceMap": true,
        "noImplicitAny": true,
        "noImplicitReturns": true,
        "lib": 
            "es2015",
            "es5",
            "es6",
            "dom"
        ,
        "noUnusedLocals": true,
        "module": "commonjs",
        "strict": false
    },
    "include":  "lib/*", "./main.ts" 
}

and in your HTML file, as a substitute of importing the ‘.js’, merely import the ‘.ts’, like this:

<script src="https://codeutility.org/2023/02/10/model-view-controller-typescript-exports-is-not-defined-code-utility/main.ts"></script>

then, run Parcel with this command line:

parcel index.html

the Parcel bundler will create a dist listing containing all of your wanted recordsdata (html and transcoded JavaScript) and it’ll run a neighborhood webserver at:

http://localhost:1234

with scorching module reloading (in your browser window).

READ : Error when requiring discordjs: “cannot find module ‘node:events’”

When you end your work, you simply should deploy the dist listing 😉

Question 6

Similar to TypedSource’s reply, however in case you can’t or don’t wish to output into one js file you are able to do the next:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta title="viewport" content material="width=device-width, initial-scale=1.0">
</head>
<physique>
    @RenderBody()

    <script src="https://codeutility.org/2023/02/10/model-view-controller-typescript-exports-is-not-defined-code-utility/~/scripts/user.js"></script>
    <script src="~/scripts/main.js"></script>
</physique>
</html>

User.ts :

class User {
    firstName: string;
    lastName: string;
}

essential.ts

/// <reference path="User.ts" />

// import { User } from "./user"; // not wanted if referenced & User.js file is loaded
console.log(new User());

Question 7

This was my story:

I had the identical downside as a result of the browser makes use of fashionable export/import assertion, whereas Typescript makes use of the default commonJS. So, within the tsconfig.json file, set the next modifications:

goal: "es2015",

module: "es2015",

I feel in case you use BabolonJS,it might be higher to set "moduleResolution” to "node" explicitly, nonetheless it might make no distinction.

Question 8

This labored for me:

my-enum.ts

const MyEnum = {
'take a look at': 456,
'Default': 123
}

Component.ts

import * as MyEnum from 'my-enum';

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