---
title: "Explain, How to perform heavy task in the background using HTML5 and JavaScript?"
description: "Explain, How to perform heavy task in the background using HTML5 and JavaScript?"
author: "Gurmeet Kaur"
published: 2018-11-17
canonical: https://answers.mindstick.com/qa/51735/explain-how-to-perform-heavy-task-in-the-background-using-html5-and-javascript
category: "programming"
tags: ["html5", "javascript"]
reading_time: 1 minute
---
# Explain, How to perform heavy task in the background using HTML5 and JavaScript?
[Explain](https://yourviews.mindstick.com/view/86025/content-created-for-humans-not-for-bots-explain-this-statement), how to perform heavy [task](https://www.mindstick.com/news/2470/bank-of-israel-wants-to-manage-stable-crypto-assets) in the [background](https://www.mindstick.com/articles/65/how-to-change-background-color-of-tab-control-in-c-sharp) using [HTML5](https://www.mindstick.com/articles/1535/offline-add-edit-delete-data-in-html5-indexeddb) and [JavaScript](https://www.mindstick.com/articles/1530/design-a-simple-stylish-calculator-using-html-css-and-javascript)?
## Answers
### Answer by Arti Mishra
**"Using WebWorker API"** \
**HTML5 provides WebWorker API to perform JS operation on the background** so that **we can reduce the CPU time** **and work** because **some time JS create a web page as responsive due to the huge amount of work performed by CPU.** \
In HTML **"Worker" class is defined** to perform JS operation on the background.
\
.
**Here is a simple example for performing the heavy task in the background.**
```