In this tip, I will explain how to setup TypeScript in Visual Studio code for developing applications.
You can get more information about TypeScript from here.
To practice TypeScript (playground), please visit http://www.typescriptlang.org/Playground and http://www.typescriptlang.org/Tutorial.
Using the Code
In this tip, I will create and run TypeScript code to display a simple message. For this purpose, I will be using Visual Studio Code, Microsoft released (preview) new look code editor that supports developing cross-platform applications in Linux, Mac and Windows, etc.
To install VS code, please visit this page.
When installed, you can run it easily from Windows by opening the command prompt and typing:
It will open up the editor and it will look as below:
In the command prompt, I have created a folder and then typed Code . and hitting Enter key. It opens the VS code.
The Editor has rich features and I will not cover all of those, but I will go through some of the features related to the tips.
As you can see, the foldername (HELLOWORLD) appears on the left pane, where you can start writing your code.
Right next to HELLOWORLD folder, there are few icons - to create file, create folder. We need to create files so I have clicked the create file icon and created a file called HelloWorld.ts. The content of the file is as below:
let message = "Hello World! - From TypeScript in VS Code";
To add the task runner, click Configure Task Runner and it will add a file called tasks.json as below:
We would like to display the message in a page, to do this, I have added index.html file and the contents of the file are as below:
<h3>Practising TypeScript in VS Code</h3>
<input type="button" onclick="Greet()" value="Say Hello">
To check our code is running, we can use the zero-effort http-server which can be installed using npm from the command prompt. I have opened the command from by right clicking index.html file and when it opens, I have run the command:
npm install -g http-server // to install the http server
After it is installed, we can run the server by typing the command:
and it will run the server at port 8080 as below:
We can now open a browser and can see the page as below:
Clicking the button, we can see the message (alert) displayed as expected.
We have setup and run typescript successfully, we will be able to create and run more code in TypeScript.
Points of Interest
- TypeScript Version 1.5.3
- VS Code (preview) 0.8.0
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