diff --git a/lib/ui/progress.coffee b/lib/ui/progress.coffee
deleted file mode 100644
index d5466317..00000000
--- a/lib/ui/progress.coffee
+++ /dev/null
@@ -1,62 +0,0 @@
-{CompositeDisposable} = require 'atom'
-{client} = require '../connection'
-{formatTimePeriod} = require '../misc'
-
-module.exports =
-  progs: {}
-
-  activate: (ink) ->
-    @subs = new CompositeDisposable
-    @ink = ink
-    client.handle 'progress': (t, id, m) => @[t] id, m
-    status = []
-    @subs.add(
-      client.onWorking  =>
-        status = @ink.progress.add(null, description: 'Julia')
-      client.onDone     => status?.destroy()
-      client.onAttached => @ink.progress.show()
-      client.onDetached => @clear()
-    )
-
-  deactivate: ->
-    @clear()
-    @subs.dispose()
-
-  add: (id) ->
-    pr = @ink.progress.add()
-    pr.t0 = Date.now()
-    pr.showTime = true
-    @progs[id] = pr
-
-  progress: (id, prog) ->
-    pr = @progs[id]
-    return unless pr?
-    pr.level = prog
-    if pr.showTime then @rightText id, null
-
-  message:  (id, m) -> @progs[id]?.message = m
-
-  leftText: (id, m) -> @progs[id]?.description = m
-
-  rightText: (id, m) ->
-    pr = @progs[id]
-    return unless pr?
-    if m?.length
-      pr.rightText = m
-      pr.showTime = false
-    else
-      dt = (Date.now() - pr.t0)*(1/pr.level - 1)/1000
-      pr.showTime = true
-      pr.rightText = formatTimePeriod dt
-
-  delete: (id) ->
-    pr = @progs[id]
-    return unless pr?
-    pr.destroy()
-    delete @progs[id]
-
-  clear: ->
-    for _, p of @progs
-      p?.destroy()
-    @progs = {}
-    @ink.progress.hide()
diff --git a/lib/ui/progress.js b/lib/ui/progress.js
new file mode 100644
index 00000000..a2ea9f9e
--- /dev/null
+++ b/lib/ui/progress.js
@@ -0,0 +1,77 @@
+'use babel'
+import { CompositeDisposable } from 'atom';
+import client  from '../connection/client';
+import { formatTimePeriod } from '../misc';
+
+export let progs = {}
+
+let subs;
+let ink;
+export function activate(ink_in) {
+    subs = new CompositeDisposable;
+    ink = ink_in;
+    client.handle({'progress': (t, id, m) => this[t](id, m)});
+    let status = [];
+    subs.add(
+      client.onWorking(() => {
+        return status = ink.progress.add(null, {description: 'Julia'});
+      }),
+      client.onDone(() => (status != null ? status.destroy() : undefined)), // status?.destroy()
+      client.onAttached(() => ink.progress.show()),
+      client.onDetached(() => clear())
+    );
+}
+
+export function deactivate() {
+    clear();
+    subs.dispose();
+}
+
+export function add(id) {
+    const pr = ink.progress.add();
+    pr.t0 = Date.now();
+    pr.showTime = true;
+    progs[id] = pr;
+}
+
+export function progress(id, prog) {
+    const pr = progs[id];
+    if (pr == null) { return; }
+    pr.level = prog;
+    if (pr.showTime) { return rightText(id, null); }
+}
+
+export function message(id, m) { return (progs[id] != null ? progs[id].message = m : undefined); } // progs[id]?.message = m
+
+export function leftText(id, m) { return (progs[id] != null ? progs[id].description = m : undefined); } // progs[id]?.description = m
+
+export function rightText(id, m) {
+    const pr = progs[id];
+    if (pr == null) { return; }
+    if (m != null ? m.length : undefined) {
+      pr.rightText = m;
+      return pr.showTime = false;
+    } else {
+      const dt = ((Date.now() - pr.t0)*((1/pr.level) - 1))/1000;
+      pr.showTime = true;
+      return pr.rightText = formatTimePeriod(dt);
+    }
+}
+
+export function deleteit(id) {
+    const pr = progs[id];
+    if (pr == null) { return; }
+    pr.destroy();
+    delete progs[id];
+}
+
+export function clear() {
+    for (let _ in progs) {
+      const p = progs[_];
+      if (p != null) {
+        p.destroy();
+      }
+    }
+    progs = {};
+    ink.progress.hide();
+}