Port of initial flow annotations to Typescript approach.

build_src.js

@@ -7,7 +7,7 @@ const commonjs = require('rollup-plugin-commonjs');
 const json = require('rollup-plugin-json');
 const includePaths = require('rollup-plugin-includepaths');
 const colors = require('colors/safe');
-const flow = require('rollup-plugin-flow');
+const typescript = require('rollup-plugin-typescript');
 
 
 module.exports = function buildSrc() {
@@ -29,7 +29,7 @@ module.exports = function buildSrc() {
             .rollup({
                 input: './modules/id.js',
                 plugins: [
-                    flow(),
+                    typescript(),
                     includePaths({
                         paths: [
                             'node_modules/d3/node_modules' // for npm 2

modules/util/session_mutex.js → modules/util/session_mutex.ts

@@ -1,19 +1,17 @@
-// @flow
 // A per-domain session mutex backed by a cookie and dead man's
 // switch. If the session crashes, the mutex will auto-release
 // after 5 seconds.
 
-// This is a type alias (https://flow.org/en/docs/types/aliases/) which allows flow to understand the object returned by utilSessionMutex in other files.
-type utilSessionMutexType = {
+export interface utilSessionMutexType {
     lock: () => boolean,
     unlock: () => void,
     locked: () => boolean
 };
 
 // This accepts a string and returns an object that complies with utilSessionMutexType
 export function utilSessionMutex(name: string): utilSessionMutexType {
-    var mutex = {};
-    var intervalID: ?IntervalID; // This indicates a Maybe type - intervalId can be null so we need to use "?IntervalID", not "IntervalID"
+    var mutex = <utilSessionMutexType>{};
+    var intervalID: number;
 
     function renew() {
         var expires = new Date();

package.json

@@ -10,7 +10,7 @@
   ],
   "license": "ISC",
   "scripts": {
-    "all": "npm-run-all -s clean flow build dist",
+    "all": "npm-run-all -s clean build dist",
     "build": "node development_server.js",
     "clean": "shx rm -f dist/*.js dist/*.map dist/*.css dist/img/*.svg",
     "dist": "npm-run-all -p dist:**",
@@ -73,6 +73,7 @@
     "rollup-plugin-includepaths": "~0.2.2",
     "rollup-plugin-json": "~2.2.0",
     "rollup-plugin-node-resolve": "~3.0.0",
+    "rollup-plugin-typescript": "^0.8.1",
     "shelljs": "^0.8.0",
     "shx": "^0.2.1",
     "sinon": "^4.0.0",
@@ -92,4 +93,4 @@
   "engines": {
     "node": ">=4.0.0"
   }
-}
+}