Use Rx 3.1.0

Adds support to get current value of Vars.

1 files changed, 14 insertions, 4 deletions

diff --git a/frontend/ts/src/lib/rx.ts b/frontend/ts/src/lib/rx.ts
index 5edd3c1..b532842 100644
--- a/frontend/ts/src/lib/rx.ts
+++ b/frontend/ts/src/lib/rx.ts
@@ -1,4 +1,4 @@
-// Rx 3.0.0
+// Rx 3.1.0
 
 // Html
 
@@ -266,16 +266,22 @@ export function pure<A>(value: A): Rx<A> {
   return new Pure(value)
 }
 
-class Var<A> extends Rx<A> {
+export class Var<A> extends Rx<A> {
   readonly type: 'Var'
   readonly id: string
   readonly update: (f: (value: A) => A) => void
+  readonly now: () => A
 
-  constructor(id: string, update: (v: Var<A>) => ((f: ((value: A) => A)) => void)) {
+  constructor(
+      id: string,
+      update: (v: Var<A>) => ((f: ((value: A) => A)) => void),
+      now: (v: Var<A>) => (() => A)
+  ) {
     super()
     this.id = id
     this.type = 'Var'
     this.update = update(this)
+    this.now = now(this)
   }
 }
 
@@ -350,7 +356,11 @@ class State {
   }
 
   register<A>(initValue: A) {
-    const v = new Var(this.varCounter.toString(), v => (f => this.update(v, f)))
+    const v = new Var(
+        this.varCounter.toString(),
+        v => (f => this.update(v, f)),
+        v => () => this.get(v)
+    )
     this.varCounter += BigInt(1)
     this.state[v.id] = {
       value: initValue,