watch file

package.json

@@ -13,6 +13,7 @@
   },
   "main": "background.js",
   "dependencies": {
+    "chokidar": "^3.1.1",
     "core-js": "^2.6.5",
     "python-shell": "^1.0.8",
     "vue": "^2.6.10"

src/components/Indicator.vue

@@ -24,6 +24,9 @@
 
 <script>
     const { PythonShell } = require('python-shell');
+    const chokidar = require('chokidar');
+    const fs = require("fs");
+
     const pyShellOptions = {
         pythonPath: 'venv/bin/python3',
         pythonOptions: ['-u'], // get print results in real-time
@@ -39,6 +42,14 @@
                 if (err) console.log(err);
                 console.log('finished');
             });
+            let  watcher = chokidar.watch('images/result.txt', {persistent: true});
+            watcher.on('all', path => {
+                fs.readFile('images/result.txt','utf-8', (err, data) => {
+                    if (err) throw err;
+                    console.log(data);
+                    this.status = parseInt(data);
+                });
+            })
         }
     };
 </script>

yarn.lock

@@ -2187,7 +2187,7 @@ chokidar@^2.0.2, chokidar@^2.1.8:
   optionalDependencies:
     fsevents "^1.2.7"
 
-chokidar@^3.0.2:
+chokidar@^3.0.2, chokidar@^3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-3.1.1.tgz#27e953f3950336efcc455fd03e240c7299062003"
   integrity sha512-df4o16uZmMHzVQwECZRHwfguOt5ixpuQVaZHjYMvYisgKhE+JXwcj/Tcr3+3bu/XeOJQ9ycYmzu7Mv8XrGxJDQ==