How to watch and compile all TypeScript sources?

Solution 1:

Create a file named tsconfig.json in your project root and include following lines in it:

{
    "compilerOptions": {
        "emitDecoratorMetadata": true,
        "module": "commonjs",
        "target": "ES5",
        "outDir": "ts-built",
        "rootDir": "src"
    }
}

Please note that outDir should be the path of the directory to receive compiled JS files, and rootDir should be the path of the directory containing your source (.ts) files.

Open a terminal and run tsc -w, it'll compile any .ts file in src directory into .js and store them in ts-built directory.

Solution 2:

TypeScript 1.5 beta has introduced support for a configuration file called tsconfig.json. In that file you can configure the compiler, define code formatting rules and more importantly for you, provide it with information about the TS files in your project.

Once correctly configured, you can simply run the tsc command and have it compile all the TypeScript code in your project.

If you want to have it watch the files for changes then you can simply add --watch to the tsc command.

Here's an example tsconfig.json file

{
"compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "declaration": false,
    "noImplicitAny": false,
    "removeComments": true,
    "noLib": false
},
"include": [
    "**/*"
],
"exclude": [
    "node_modules",
    "**/*.spec.ts"
]}

In the example above, I include all .ts files in my project (recursively). Note that you can also exclude files using an "exclude" property with an array.

For more information, refer to the documentation: http://www.typescriptlang.org/docs/handbook/tsconfig-json.html

Solution 3:

you can watch all files like this

tsc *.ts --watch

Solution 4:

Technically speaking you have a few options here:

If you are using an IDE like Sublime Text and integrated MSN plugin for Typescript: http://blogs.msdn.com/b/interoperability/archive/2012/10/01/sublime-text-vi-emacs-typescript-enabled.aspx you can create a build system which compile the .ts source to .js automatically. Here is the explanation how you can do it: How to configure a Sublime Build System for TypeScript.

You can define even to compile the source code to destination .js file on file save. There is a sublime package hosted on github: https://github.com/alexnj/SublimeOnSaveBuild which make this happen, only you need to include the ts extension in the SublimeOnSaveBuild.sublime-settings file.

Another possibility would be to compile each file in the command line. You can compile even multiple files at once by separating them with spaces like so: tsc foo.ts bar.ts. Check this thread: How can I pass multiple source files to the TypeScript compiler?, but i think the first option is more handy.