Typescript on .js file with vscode

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Generally I want to write .js file with typescript instead of Flow.

I configured the webpack to use ts-loader on js extension And work fine.

I use—checkJs on tsconfig file and it check the js file fine.

The problem that is VScode throw error on js file: [js] ‘types’ can only be used in a .ts file.

You should use .ts, not .js files for TypeScript code in order to get full IDE and other tooling support. The compiler will transform your .ts files into .js.

Working with JavaScript in Visual Studio Code, Type declaration files are written in TypeScript so they can express the data types of parameters and functions, allowing VS Code to provide a rich IntelliSense� Yes you generally should use the correct file extension but you can force VS Code to treat JS files as TypeScript by setting: Since Typescript 3 is out, and the work they have done allowing it to be combined with babel 7, it makes sense now for many programmers to have typescript in .js files.

You cannot use typescript type declarations in js files. (Even with checkJS enabled)

On JS files you have to use JSDoc annotations.

/** @type {number} */
var x;

Typescript would check these for you.

But I guess what you're looking for is a .ts file

TypeScript tutorial with Visual Studio Code, js example. Create a new folder HelloWorld and launch VS Code. mkdir HelloWorld cd HelloWorld code . From the File Explorer, create a� TypeScript in Visual Studio Code TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. It offers classes, modules, and interfaces to help you build robust components. The TypeScript language specification has full details about the language.

Yes you generally should use the correct file extension but you can force VS Code to treat JS files as TypeScript by setting:

"files.associations": {
    "*.js": "typescript"
}

TypeScript Programming with Visual Studio Code, The easiest way to install TypeScript is through npm, the Node.js Package Manager. VS Code provides IntelliSense for individual TypeScript files as well as� Node.js - A walkthrough to create an Express Node.js application. TypeScript - VS Code has great support for TypeScript, which brings structure and strong typing to your JavaScript code. Watch these introductory videos: IntelliSense - Tutorial on IntelliSense with JavaScript. Debugging - Learn how to debug a Node.js application. Common questions

Since Typescript 3 is out, and the work they have done allowing it to be combined with babel 7, it makes sense now for many programmers to have typescript in .js files.

Currently I have added the following vscode settings :

"files.associations": {
    "*.js": "typescript"
},

And restarted VSCode, and it works for me.

Hopefully vscode will provide a cleaner solution in the future.

Typescript on .js file with vscode, You should use .ts, not .js files for TypeScript code in order to get full IDE and other tooling support. The compiler will transform your .ts files into� Hi there, I have "javascript.validate.enable": false in my config, but I still receive type suggestions (from TS?): VSCode Version: 1.11.1 OS Version: Sierra 10.12.4 Steps to Reproduce: Disable validation Open JS file Hover variable / fl

How To Work With TypeScript in Visual Studio Code, js file in VS Code. app.js. "use strict"; exports.__esModule = true� When you first install VS Code, it comes with a several built-in snippets for JavaScript and Typescript. Snippets help you write repetitive code quickly. However, you may find these may not be enough.

Working with TypeScript in Visual Studio Code ― Scotch.io, I'll then start my file with an export for VS Code to think of it as a module. React Logo. Upgrade Duration: 9:40 Posted: Feb 19, 2019 TypeScript, developed by Microsoft, is a superset of JavaScript. It features static typing, class, and interface. Comparing to JavaScript, One of my favorite TypeScript features is that we can create a TypeScript declaration file (.d.ts) for IntelliSense in Visual Studio Code or other supported IDEs.

Typescript, ts files into .js files. Let's walk through transpiling a simple TypeScript Hello World program. Step 1:� sourceMap - A boolean indicating if we want a source map file for each typescript file. outDir - The path or folder name to our javascript output code. rootDir - The root directory for our typescript files. strict - A boolean indicating if we want strict checking in our typescript code. esModuleInterop - This option needs a lot more explanation

Comments
  • Thanks for your response, I know that .ts get full IDE supports. But in js file I get full typescript support to with this configuration, the problem is vscode validate type annotation and expect it only for .ts files
  • Thanks for your response, I know that .ts get full IDE supports. But in js file I get full typescript support to with this configuration, the problem is vscode validate type annotation and expect it only for .ts files
  • Did you try the JS doc annotation . Doesnt that work for you?
  • This helps but VSCode restart is required, as specified by @jony89 answer and according to my experience