Use MAJOR_VERSION from package.json

src/components/App/client-api.ts

@@ -3,16 +3,14 @@ import { SideEvent, SideEventType } from '../compress/index';
 
 import { expose } from 'comlink';
 
-const API_VERSION = 1;
-
 export function exposeAPI(app: App) {
-  self.parent.postMessage({ type: 'READY', version: API_VERSION }, '*');
+  self.parent.postMessage({ type: 'READY', version: MAJOR_VERSION }, '*');
   self.addEventListener('message', (event: MessageEvent) => {
     if (event.data !== 'READY?') {
       return;
     }
     event.stopImmediatePropagation();
-    self.parent.postMessage({ type: 'READY', version: API_VERSION }, '*');
+    self.parent.postMessage({ type: 'READY', version: MAJOR_VERSION }, '*');
   });
   expose(new API(app), self.parent);
 }

src/components/App/index.tsx

@@ -70,8 +70,10 @@ export default class App extends Component<Props, State> {
     });
 
     window.addEventListener('popstate', this.onPopState);
-    /* webpackChunkName: "client-api" */
-    import('./client-api').then(m => m.exposeAPI(this));
+    import(
+      /* webpackChunkName: "client-api" */
+      './client-api',
+     ).then(m => m.exposeAPI(this));
   }
 
   @bind openFile(file: File | Fileish) {

src/missing-types.d.ts

@@ -34,6 +34,7 @@ declare module 'url-loader!*' {
 }
 
 declare var VERSION: string;
+declare var MAJOR_VERSION: string;
 
 declare var ga: {
   (...args: any[]): void;

webpack.config.js

@@ -263,6 +263,7 @@ module.exports = async function (_, env) {
       // Inline constants during build, so they can be folded by UglifyJS.
       new webpack.DefinePlugin({
         VERSION: JSON.stringify(VERSION),
+        MAJOR_VERSION: JSON.stringify(VERSION.split(".")[0]),
         // We set node.process=false later in this config.
         // Here we make sure if (process && process.foo) still works:
         process: '{}'