Shulou(Shulou.com)06/01 Report--

Today, the editor will share with you the relevant knowledge points about how to create Web Worker objects in JavaScript. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article.

Create Web Worker objects in JavaScript

Web Worker is a JavaScript that runs in the background and does not affect the performance of the page.

The following line of code checks whether worker already exists, and if not, it creates a new web worker object and runs the code in "demo_workers.js":

If (typeof (w) = = "undefined") {

W = new Worker ("demo_workers.js")

}

Then we can send and receive messages from web worker.

Add a "onmessage" event listener to web worker.

W.onmessage = function (event) {

Document.getElementById ("result") [xss_clean] = event.data

}

When Web Worker publishes a message, the code in the event listener is executed. Data from Web Worker is stored in event.data.

Terminating Web Worker

When the web worker object is created, it continues to listen to the message (even after the external script completes) until it is terminated.

To terminate web worker and release browser / computer resources, use the terminate () method:

W.terminate ()

Reuse Web Worker

If you set the worker variable to undefined, you can reuse the following code after it terminates:

W = undefined

These are all the contents of the article "how to create Web Worker objects in JavaScript". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.