Clarify Script Loading by Removing Redundant `async` and `defer`

JavaScript Analyzer

What is this warning?

A script on your page has both the `async` and `defer` attributes. This is confusing for the browser. While it won't break your site (browsers will typically just use `async`), it's messy code. It's better to be clear about how you want your scripts to load.

How to Fix This Issue

How to Fix It

The Problem

<script src="/js/main.js" async defer></script>

The Solution

Choose one. Use `defer` for scripts that need to run in order after the page is parsed. Use `async` for independent scripts where the execution order doesn't matter.

<script src="/js/main.js" defer></script> <!-- Or async, but not both -->

Why This Works

Providing a single, clear instruction for script loading follows best practices and makes your code easier for other developers (and the browser) to understand.

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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