Some notes on converting JS to TypeScript with the help of PowerShell

ConvertJavaScriptToTypeScript.md

Convert an existing project to TypeScript?

Rename files from javascript to typescript

ls *.js -Recurse | foreach{ move-item $_ ($_.FullName.TrimEnd("js") + "ts") }

install grunt-typescript (There are other TypeScript packages out there but I tried this one and it worked)

npm install grunt-typescript --save-dev

update gruntfile

1

typescript: {
    base: {
        src: ['lib/**/*.ts'],
        options: {
            target: 'es5',
            module: 'commonjs'
        }
    }
},

2

grunt.loadNpmTasks('grunt-typescript');

3

grunt.registerTask('default', ['typescript', 'test', 'jshint']);

run 'grunt'

Ignore files generated by TypeScript

npm install -g tsd

or Nuget to download

install a reference to the node type definitions

tsd install node

create a common references file.

new-item -path ./lib/references.ts -type file -value '/// <reference path="../d.ts/DefinitelyTyped/node/node.d.ts" />'

prepend each typescript file with a link to the references file.

• Put the references.ts path into the root of each file.

    $projectRoot = (pwd).path;
    ls .\lib\* -exclude references.ts -Include *.ts -Recurse | %{ $subCount = ($_.Directory.FullName).replace($projectRoot + '\', '').split('\').length-1; $file = cat $_; sc $_ -value ("///<reference path='" + ("../" * $subCount) + "references.ts' />" + [System.Environment]::NewLine), $file }

remove all the lib js files and prove it still works.

rm .\lib\* -Recurse -Include *.js

Does it actually transpile all the JS code into TS code ?