Upgraded to TypeScript 2.9

.vscode/settings.json

@@ -13,6 +13,6 @@
 	"prettier.useTabs": false,
 	"prettier.printWidth": 100,
 	"prettier.singleQuote": false,
-    "typescript.tsdk": "node_modules/typescript/lib"
-    // "javascript.validate.enable": false // enable for flow
+	"typescript.tsdk": "node_modules/typescript/lib"
+	// "javascript.validate.enable": false // enable for flow
 }

package.json

@@ -70,7 +70,7 @@
     "tape": "^4.2.2",
     "ts-jest": "^22.0.0",
     "tslib": "^1.7.1",
-    "typescript": "^2.1.4",
+    "typescript": "^2.9.0",
     "uglify-es": "^3.3.9"
   },
   "dependencies": {},

src/api/observabledecorator.ts

@@ -19,7 +19,7 @@ export function createDecoratorForEnhancer(enhancer: IEnhancer<any>): IObservabl
         (
             target: any,
             propertyName: string,
-            descriptor: BabelDescriptor,
+            descriptor: BabelDescriptor | undefined,
             _decoratorTarget,
             decoratorArgs: any[]
         ) => {

src/api/tojs.ts

@@ -80,7 +80,7 @@ function toJSHelper(source, options: ToJSOptions, __alreadySeen: Map<any, any>)
 export function toJS<T>(source: T, options?: ToJSOptions): T
 export function toJS(source: any, options?: ToJSOptions): any
 export function toJS(source, options: ToJSOptions) // internal overload
-export function toJS(source, options: ToJSOptions) {
+export function toJS(source, options?: ToJSOptions) {
     if (!isObservable(source)) return source
 
     // backward compatibility

src/core/computedvalue.ts

@@ -81,11 +81,11 @@ export class ComputedValue<T> implements IObservable, IComputedValue<T>, IDeriva
     __mapid = "#" + getNextId()
     protected value: T | undefined | CaughtException = new CaughtException(null)
     name: string
-    triggeredBy: string
+    triggeredBy?: string
     isComputing: boolean = false // to check for cycles
     isRunningSetter: boolean = false
     derivation: () => T
-    setter: (value: T) => void
+    setter?: (value: T) => void
     isTracing: TraceMode = TraceMode.NONE
     public scope: Object | undefined
     private equals: IEqualsComparer<any>
@@ -105,7 +105,7 @@ export class ComputedValue<T> implements IObservable, IComputedValue<T>, IDeriva
      */
     constructor(options: IComputedValueOptions<T>) {
         if (process.env.NODE_ENV !== "production" && !options.get)
-            return fail("missing option for computed: get")
+            throw "[mobx] missing option for computed: get"
         this.derivation = options.get!
         this.name = options.name || "ComputedValue@" + getNextId()
         if (options.set) this.setter = createAction(this.name + "-setter", options.set) as any

src/utils/utils.ts

@@ -125,7 +125,7 @@ export function isPropertyConfigurable(object: any, prop: PropertyKey): boolean
 export function assertPropertyConfigurable(object: any, prop: PropertyKey) {
     if (process.env.NODE_ENV !== "production" && !isPropertyConfigurable(object, prop))
         fail(
-            `Cannot make property '${prop}' observable, it is not configurable and writable in the target object`
+            `Cannot make property '${prop.toString()}' observable, it is not configurable and writable in the target object`
         )
 }
 

tsconfig.json

@@ -2,18 +2,19 @@
     "version": "2.0.10",
     "compilerOptions": {
         "target": "es6",
+        "module": "commonjs",
+        "moduleResolution": "node",
+        "alwaysStrict": true,
         "outDir": "lib",
         "sourceMap": false,
         "declaration": true,
-        "module": "commonjs",
         "removeComments": false,
-        "strictNullChecks": true,
+        "strict": true,
         "noImplicitReturns": true,
-        "noImplicitUseStrict": true,
         "noUnusedLocals": true,
+        "noUnusedParameters": false,
         "noImplicitAny": false,
-        "moduleResolution": "node",
-        "downlevelIteration": true,
+        "noImplicitThis": false,
         "lib": [
             "es6"
         ]

yarn.lock

@@ -5834,9 +5834,9 @@ typedarray@~0.0.5:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@^2.1.4:
-  version "2.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.8.3.tgz#5d817f9b6f31bb871835f4edf0089f21abe6c170"
+typescript@^2.9.0:
+  version "2.9.1"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.9.1.tgz#fdb19d2c67a15d11995fd15640e373e09ab09961"
 
 uglify-es@^3.3.9:
   version "3.3.9"