Replace Inline Event Handlers with Modern JavaScript

Web Vitals Analyzer

What is this warning?

Your page uses inline event handlers (like onclick attributes) which can impact performance and security. Modern JavaScript event handling is more efficient and secure.

How to Fix This Issue

How to Fix It

The Problem

<button onclick="handleClick()">Click me</button>

The Solution

Use addEventListener in your JavaScript instead.

<button id="myButton">Click me</button>
<script>
  document.getElementById('myButton').addEventListener('click', handleClick);
</script>

Why This Works

Modern event handling is more efficient, allows for better Content Security Policy implementation, and can improve Interaction to Next Paint (INP) scores.

SEO Impact

This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.

Automatic Detection

Black SEO Analyzer automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.

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