Set TS configuration

package.json

@@ -40,6 +40,7 @@
     "webpack": "2.3.2"
   },
   "devDependencies": {
+    "@types/underscore": "^1.8.1",
     "autoprefixer-core": "5.2.1",
     "aws-sdk": "2.0.0-rc11",
     "babel-core": "6.25.0",
@@ -89,6 +90,8 @@
     "source-map-support": "0.4.0",
     "stringify": "5.1.0",
     "tpl-loader": "CartoDB/tpl-loader#master",
+    "ts-loader": "^2.2.2",
+    "typescript": "^2.4.1",
     "uglify-js": "2.7.x",
     "watchify": "3.7.0",
     "webpack-bundle-analyzer": "^2.4.0",

tsconfig.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "allowJs": true,
+    "noImplicitAny": false,
+    "lib": [
+      "es5",
+      "es2015",
+      "dom"
+    ],
+    "target": "es5",
+    "module": "es2015",
+    "moduleResolution": "node",
+    "sourceMap": true
+  }
+}

webpack.dev.config.js

@@ -28,6 +28,7 @@ module.exports = env => {
     },
     resolve: {
       symlinks: false,
+      extensions: ['.js', '.ts'],
       modules: [
         resolve(__dirname, 'node_modules'),
         resolve(__dirname, 'lib/assets/node_modules')
@@ -96,6 +97,10 @@ module.exports = env => {
             }
           }
         },
+        {
+          test: /\.ts$/,
+          loader: 'ts-loader'
+        },
         {
           test: /\.tpl$/,
           use: 'tpl-loader',