How Can I Detect YouTube Page Navigation to Modify Content Seamlessly?

Detecting Page Navigation on YouTube for Seamless Content Modification

Overview

Inserting HTML content onto a page can be challenging when there are no page reloads. This article delves into the question of how to detect page navigation on YouTube and seamlessly modify its appearance without delay.

Detection Methods

• Background or Service Worker Script: The Web Navigation API and Tabs API can be used to detect URL changes.
• Content Script and navigatesuccess Event: This method is supported in modern Chrome versions.
• Content Script and Site's Own Event: YouTube triggers custom events for navigation, including 'yt-navigate-start' and 'yt-navigate-finish'.

Implementation Example

Manifest.json:

{
  "content_scripts": [{
    "matches": ["*://*.youtube.com/*"],
    "js": ["content.js"],
    "run_at": "document_start"
  }]
}

Content.js:

document.addEventListener('yt-navigate-start', process);

if (document.body) process();
else document.addEventListener('DOMContentLoaded', process);

function process() {
  // Insert HTML after detection
}

In this example, the 'yt-navigate-start' event is used to detect navigation. The process function modifies the page, such as adding the total playlist length to the header.

Conclusion

By using the described methods, you can detect page navigation on YouTube and make seamless modifications to its appearance, enhancing the user experience and eliminating the need for page refreshes.

The above is the detailed content of How Can I Detect YouTube Page Navigation to Modify Content Seamlessly?. For more information, please follow other related articles on the PHP Chinese website!