Web Workers let you run code in the background so your app’s main interface doesn’t get stuck. They’re perfect for heavy tasks, like crunching numbers, processing big chunks of data, or handling images, without making the UI freeze or lag.
Practical Example:
The Angular CLI can generate a worker file for you.
ng generate web-worker heavy-calculations```
You can then communicate with the worker from your component:
```typescript
// in your component.ts
if (typeof Worker !== 'undefined') { const worker = new Worker(new URL('./heavy-calculations.worker', import.meta.url), { type: 'module' }); worker.onmessage = ({ data }) => { console.log(`Received result: ${data}`); this.complexResult = data; }; // Send data to the worker to start the computation worker.postMessage(10000);
}
And the worker performs the task in the background:
// in heavy-calculations.worker.ts
addEventListener('message', ({ data }) => { const result = performComplexCalculation(data); postMessage(result);
});Final Words
Web Workers are a powerful way to improve performance in Angular apps by offloading heavy computations to background threads. This keeps your UI smooth and responsive, even during complex tasks. To implement them efficiently and avoid thread management pitfalls, it’s smart to hire Angular developers who have hands-on experience with performance tuning and scalable architecture.
