How to Detect Element Addition to Web Pages as a Browser Extension Using Periodic Checking?

Detecting Element Addition on a Web Page as a Browser Extension

To notify oneself upon addition of a DOM element to a page, consider the following approach:

Option 1: DOM Mutation Events (Deprecated)

Previously, mutation events provided a method for monitoring DOM changes. However, their deprecation in 2012 precludes their use.

Option 2: Periodic Checking

Due to the independent nature of web pages and the inability to modify their source in a browser extension context, periodic checking remains the only viable solution.

Implement a function checkDOMChange() to:

• Continuously check for new elements being inserted or specific nodes being modified.
• Recursively call itself every 100 milliseconds (1/10th of a second) to ensure ongoing monitoring.

<code class="python">function checkDOMChange() {
    // Check for element insertion or node modification

    // Recursively call the function after 100 milliseconds
    setTimeout(checkDOMChange, 100);
}</code>

Note: While periodic checking may not be as efficient as real-time observation, it should suffice for most use cases where immediate notification is not critical.

The above is the detailed content of How to Detect Element Addition to Web Pages as a Browser Extension Using Periodic Checking?. For more information, please follow other related articles on the PHP Chinese website!